Ph.D. in Electronic Engineering, Chang Gung University

📍 Office: Room 212, Electronics Building

📞 Phone: 02-2908-9899 Ext. 5311

✉️ Email: yfwu@mail.mcut.edu.tw

🔬 Research Expertise: 

Semiconductor Materials, Optoelectronic Semiconductor Characterization, Electronic Circuits

Research Achievements:

(1) Research Projects

• Ya-Fen Wu, “Talent Cultivation Program for Science Park (FY105) – Smart Lighting Technology and Application Practice Module Course,” Hsinchu Science Park Bureau, Ministry of Science and Technology, 2016/07/01–2017/08/31.
• Ya-Fen Wu, “Talent Cultivation Program for Science Park (FY104) – Solid-State Lighting and Optoelectronic Application Practice Module Course,” Hsinchu Science Park Bureau, Ministry of Science and Technology, 2015/07/01–2016/08/31.
• Ya-Fen Wu, “FY103 Talent Cultivation Subsidy Program for Science Park – Solid-State Lighting and Optoelectronic Application Practice Module Course,” Science Park Administration, 2014/07/01–2015/08/31.
• Ya-Fen Wu, “FY102 Talent Cultivation Subsidy Program for Science Park – Solid-State Lighting and Optoelectronic Application Practice Module Course,” Science Park Administration, 2013/07/01–2014/08/31.
• Ya-Fen Wu, “FY101 Talent Cultivation Subsidy Program for Science Park – Solid-State Lighting and Optoelectronic Application Practice Module Course,” Science Park Administration, 2012/07/01–2013/07/31.
• Ya-Fen Wu, “FY100 Talent Cultivation Subsidy Program for Science Park – Solid-State Lighting and Optoelectronic Application Practice Module Course,” Science Park Administration, 2011/07/01–2012/07/31.
• Ya-Fen Wu, “Physical and Optical Properties of Compound Semiconductor Microstructures,” National Science Council (NSC), 2010/08/01–2011/07/31.
• Ya-Fen Wu, “FY99 Talent Cultivation Subsidy Program for Science Park – Solid-State Lighting and Optoelectronic Application Practice Module Course,” Science Park Administration, 2010/07/01–2012/07/31.
• Ya-Fen Wu, “Optical Simulation of LED Light Sources,” Industry–Academia Collaboration Project, 2010/09/15–2011/09/14.
• Ya-Fen Wu, “Physical and Optical Properties of Compound Semiconductor Microstructures,” National Science Council (NSC), 2009/08/01–2010/07/31.
• Ya-Fen Wu, “Promotion Program for High-Tech Patent Acquisition and Strategy,” Ministry of Education (MOE), 2009/07/01–2010/02/28.
• Ya-Fen Wu, “FY98 Talent Cultivation Subsidy Program for Science Park – Solid-State Lighting and Optoelectronic Application Practice Module Course,” Science Park Administration, 2009/07/01–2010/07/31.
• Ya-Fen Wu, “FY98 University–Industry Cooperation Program for SMEs – Embedded Coin Recognition System for Coin-Operated Machines,” 2009/06/01–2010/11/30.
• Ya-Fen Wu, “Optical Emission Spectroscopy of Semiconductor Structures with Quantum Confinement States,” National Science Council (NSC), 2008/08/01–2009/07/31.
• Ya-Fen Wu, “MOE Subsidized Interdisciplinary Course Program for Electrical and Information Engineering Departments – High-Tech Patent Acquisition and Strategy (FY97),” Ministry of Education (MOE), 2008/09/01–2009/08/31.

（2）Journal Papers

• Der-Yuh Lin, Hung-Pin Hsu, Kuang-Hsin Liu, Po-Hung Wu, Yu-Tai Shih, Ya-Fen Wu, Yi-Ping Wang, Chia-Feng Lin, “Enhanced Optical Response of SnS/SnS2 Layered Heterostructure,” SENSORS, 23(10), pp.4976-1–4976-12, 2023.
• Chien-Wen Lin, Jen-Cheng Wang, Bo-Yan Zhong, Joe-Air Jiang, Ya-Fen Wu, Shao-Wei Leu, and Tzer-En Nee, “Continuous Symmetry Analysis of the Effects of City Infrastructures on Invariant Metrics for House Market Volatilities,” CMES – Computer Modeling in Engineering & Sciences, 133(3), pp.619–638, 2022.
• Chih-Chien Lee, Johan Iskandar, Ade Kurniawan, Hung-Pin Hsu, Ya-Fen Wu, Hsin-Ming Cheng, Shun-Wei Liu, “Modulation of the Carrier Balance of Lead-Halide Perovskite Nanocrystals by Polyelectrolyte Hole Transport Layers for Near-Infrared Light-Emitting Diodes,” Heliyon, 8(9), e10504-1–e10504-11, 2022.
• Tzer-En Nee, Jen-Cheng Wang, Bo-Yan Zhong, Jui-Ju Hsiao, Ya-Fen Wu, “Thermophysical Characterization of Efficiency Droop in GaN-Based Light-Emitting Diodes,” Nanomaterials, 11(6), 1449-1–1449-13, 2021.
• Chien-Wen Lin, Jen-Cheng Wang, Bo-Yan Zhong, Joe-Air Jiang, Ya-Fen Wu, Shao-Wei Leu, and Tzer-En Nee, “Lie Symmetry Analysis of the Effects of Urban Infrastructures on Residential Property Values,” PLOS ONE, 16(8), e0255233-1–e0255233-15, 2021.
• Kuo-Chieh Kuo, Lin Ya-Liang, Chen Yi-Hui, Ya-Fen Wu, “Properties of Organic–Inorganic Hybrid Perovskite Thin Films,” Journal of Taipei City University, 44, pp.1–10, 2021.
• Hung-Pin Hsu, Der-Yuh Lin, Chien-Wen Chen, Ya-Fen Wu, K. Strzalkowski, P. Sitarek, “Optical Characterizations of Cd1-xZnxTe Mixed Crystals Grown by Vertical Bridgman-Stockbarger Method,” Journal of Crystal Growth, 534, 125491-1–125491-5, 2020.
• Jui-Ju Hsiao, Yi-Jen Huang, Hung-Ing Chen, Joe-Air Jiang, Jen-Cheng Wang, Ya-Fen Wu, Tzer-En Nee, “Intensive Measures of Luminescence in GaN/InGaN Heterostructures,” PLOS ONE, 14(9), e0222928-1–e0222928-14, 2019.
• Ya-Fen Wu, Jiunn-Chyi Lee, “Performance of Nanostructures within InGaN-Based Multiquantum-Well Light-Emitting Devices,” Applied Sciences, 7(4), 380-1–380-8, 2017.
• Hung-Ing Chen, Jui-Ju Hsiao, Chia-Hui Fang, Joe-Air Jiang, Jen-Cheng Wang, Ya-Fen Wu, Tzer-En Nee, “Investigation of the Thermal Photocarrier Interaction-Recombination in ZnO Nanostructures Fabricated by the Hydrothermal Method,” Journal of Luminescence, 190, pp.136–140, 2017.
• Yi Chen, Wei-You Chen, Hung-Pin Hsu, Jiunn-Chyi Lee, Ya-Fen Wu, “Effect of Solution Molarity on Properties of Hydrothermally Grown ZnO Nanostructures,” IOP Conference Series: Materials Science and Engineering, 222, 012007-1–012007-5, 2017.
• Ya-Fen Wu, Jiunn-Chyi Lee, “Optical Characterization of Quaternary AlInGaN Multiquantum Wells,” Key Engineering Materials, 748, pp.111–115, 2017.
• Ya-Fen Wu, “Characterization of the Structural and Optical Properties of ZnO Nanostructures by X-ray Diffraction,” Journal of Materials Sciences & Engineering, 6(3), pp.78, 2017.
• Wei-You Chen, Jiunn-Chyi Lee, Hung-Pin Hsu, Ya-Fen Wu, “Photoluminescence Study of Hydrothermally Grown ZnO Nanostructures,” Proceedings of Engineering and Technology Innovation, 4, pp.16–18, 2016.
• S. L. Wu, H. P. Hsu, Ya-Fen Wu, Y. S. Huang, W. O. Charles, A. Shen, and M. C. Tamargo, “Optical Characterization of Zn0.48Cd0.52Se/Zn0.24Cd0.18Mg0.58Se Asymmetric Coupled Quantum Well Structure,” Chinese Journal of Physics, 53(1), 020801-1–020801-9, 2015.
• Ya-Fen Wu, Jiunn-Chyi Lee, “Photoluminescence and Recombination Mechanisms in Nitride-Based Multiple Quantum Wells,” Applied Mechanics and Materials, 764–765, pp.1250–1254, 2015.
• Hung-Ing Chen, Jui-Ju Hsiao, Yi-Jen Huang, Jen-Cheng Wang, Ya-Fen Wu, Bing-Yuh Lu, Tzer-En Nee, “Strain Modulated Defect Luminescence in ZnO Nanostructures Grown on Si Substrates,” Journal of Luminescence, 168, pp.304–308, 2015.
• Jui-Ju Hsiao, Hung-Ing Chen, Yi-Jen Huang, Jen-Cheng Wang, Bing-Yuh Lu, Ya-Fen Wu, Tzer-En Nee, “Subcell Debye Behavior Analysis of Order–Disorder Effects in Triple-Junction InGaP-Based Photovoltaic Solar Cells,” Journal of Luminescence, 168, pp.309–314, 2015.
• Ya-Fen Wu, Jiunn-Chyi Lee, “Characterisation of Self-Ordered Porous Anodic Alumina by X-ray Diffraction Line Profile Analysis,” International Journal of Nanotechnology, 11(12), pp.1148–1156, 2014.
• Ya-Fen Wu, Jiunn-Chyi Lee, “Carrier Hopping and Relaxation in InAs/GaAs Quantum Dot Heterostructures,” Advanced Materials Research, 875–877, pp.9–13, 2014.
• Ya-Fen Wu, J. C. Lee, “CuIn1−xGaxSe2 Thin Films Prepared by Co-Evaporation Technique,” Advanced Materials Research, 827, pp.12–15, 2014.
• Ya-Fen Wu, “Investigation of Strain Effect in InGaN/GaN Multi-Quantum Wells,” Indian Journal of Pure & Applied Physics, 51(1), pp.39–43, 2013.
• Ya-Fen Wu, Hung-Pin Hsu, Hung-Ing Chen, “Characterization of the Structural and Optical Properties of CuIn1-xGaxSe2 Thin Films by X-ray Diffraction,” Journal of Luminescence, 142, pp.81–85, 2013.
• Jen-Cheng Wang, Chia-Hui Fang, Ya-Fen Wu, Wei-Jen Chen, Da-Chuan Kuo, Ping-Lin Fan, Joe-Air Jiang, Tzer-En Nee, “The Effect of Junction Temperature on the Optoelectrical Properties of InGaN/GaN Multiple Quantum Well Light-Emitting Diodes,” Journal of Luminescence, 132(2), pp.429–433, 2012.
• Ya-Fen Wu, “High-Temperature Electroluminescence of InGaN/GaN Light-Emitting Devices with Multiple Quantum Barriers,” Advances in Condensed Matter Physics, 2012, Article ID 145689.
• Ya-Fen Wu, “Effect of Growth Interruption on Photoluminescence of Self-Assembled InAs/GaAs Quantum Dot Heterostructures,” Indian Journal of Pure & Applied Physics, 50(12), pp.922–927, 2012.
• Ya-Fen Wu, Yeu-Jent Hu, Jin-Yi Sheu, Jiunn-Chyi Lee, “Wavelet Transform Method of Phase-Step Determination,” Optica Applicata, 42(1), pp.215–221, 2012.
• Ya-Fen Wu, Hung-Pin Hsu, Jen-Cheng Wang, Hui-Ying Chen, “The Structural and Material Properties of Cu(In,Ga)Se2 Thin Films,” physica status solidi (c), 9(6), pp.1388–1391, 2012.
• Ya-Fen Wu, Jiunn-Chyi Lee, Tzer-En Nee, Jen-Cheng Wang, “Characterization of Nanocrystallites of InGaN/GaN Multi-Quantum Wells by High-Resolution X-ray Diffraction,” IEEE Transactions on Nanotechnology, 10(4), pp.827–831, 2011.
• Ya-Fen Wu, Jiunn-Chyi Lee, Tzer-En Nee, Jen-Cheng Wang, “Carrier Localization Effect on Luminescence Spectra of III–V Heterostructures,” Journal of Luminescence, 131(7), pp.1267–1271, 2011.
• Ya-Fen Wu, Wu Kuo-Hao, Chang Ming-Jen, Chen Chia-Mao, “Application of Microcontroller to Multifunctional Constant Temperature System,” ET Electronic Technology, 303, pp.132–135, 2011.
• Ya-Fen Wu, Liu Tsung-You, Chang Kai-Lun, Kuo Po-Hsiang, Chen Kuan-Yu, “Design of Smart Helmet Using HT46F49E,” ET Electronic Technology, 304, pp.126–130, 2011.
• Ya-Fen Wu, Jiunn-Chyi Lee, “Thermal Effect of Multi-Quantum Barriers within InGaN/GaN Multi-Quantum Well Light-Emitting Diodes,” Thin Solid Films, 518(24), pp.7437–7440, 2010.
• Ya-Fen Wu, Jiunn-Chyi Lee, “A Rate-Equation Model for Carrier Redistribution in InAs/GaAs Quantum Dot Heterostructures,” Northern Taiwan Journal, 31, pp.45–54, 2008.
• Ya-Fen Wu, Gwo-Mei Wu, Kung-Yu Cheng, et al., “Effect of Excitonic Interactions on Abnormal Luminescence Behaviour of InGaN/GaN Light-Emitting Diodes with Electron Tunneling Layer,” Japanese Journal of Applied Physics, 47(1), pp.679–681, 2008.

（3）Conference Papers

• Ya-Fen Wu, Yung-Yao Chen, Hau-Yu Chai, “Thermal Effect on the Photoluminescence of InGaN/AlGaN Multiple Quantum Wells,” The 14th International Conference on Nitride Semiconductors (ICNS-14), Fukuoka, Japan, 2023/11/12.
• Jin-Long Yang, Bo-Chang Huang, Nai-Ren Xu, You-Sheng Liu, Ya-Fen Wu, “Face Recognition System for Smart Environments,” International Conference on Smart Devices and Sustainable Energy (SDSE 2023), New Taipei City, Taiwan, 2023/11/07.
• Guan-Ming Chen, Ting-Hao Chang, Ding-Wei Chen, Bo-You Cai, Ya-Fen Wu, “Smart IoT System for Natural Disaster Monitoring,” International Conference on Smart Devices and Sustainable Energy (SDSE 2023), New Taipei City, Taiwan, 2023/11/07.
• Endalamaw Ewnu Kassa, Ade Kurniawan, Ya-Fen Wu, Sajal Biring, “Nanoscale Surface Engineering of MAPbI3 for Ultra-Sensitive Ammonia Gas Detection Using Binary Solvent Strategies,” Global Conference for Decarbonization of Energy and Materials, Singapore, 2023/12/27.
• Ya-Fen Wu, Shao-Cheng Kai, Yu-Wei Hsu, Pei-You Tsou, “New Intelligent Parking Management System,” 2022 Engineering Technology Application Conference, Taipei, Taiwan, 2022/03/25.
• Chong-Lin Zhou, Yong-Yao Chen, Hao-Yu Chai, Ya-Fen Wu, “Investigation of All-Inorganic Perovskite Quantum Dots,” 2022 Engineering Technology Application Conference, Taipei, Taiwan, 2022/03/25.
• Zerui Lin, Peng-Xu Chen, Yi-Jie Chen, Ya-Fen Wu, “Smart Electric Kettle,” 2021 Engineering Technology Application Conference, Taipei, Taiwan, 2021/04/09.
• Jing-Wun Syu, Jyun-Peng Jhou, Ya-Fen Wu, “Characterization of Organic–Inorganic Perovskite Thin Films,” Optics & Photonics Taiwan International Conference (OPTIC 2021), Kaohsiung, Taiwan, 2021/12/02.
• Jing-Wun Syu, Che-Ting Kuo, Yi-Hui Chen, Ya-Fen Wu, “Study on Photoluminescence of All-Inorganic Perovskite Quantum Dots,” Optics & Photonics Taiwan International Conference (OPTIC 2020), Taipei, Taiwan, 2020/12/03.
• Chia-Fang Tsai, Yi-Hui Chen, Jie-Han Kuo, Chien-Chi Lee, Hung-Pin Hsu, Ya-Fen Wu, “Photoluminescence Study of All-Inorganic Perovskite Quantum Dots,” 2020 Engineering Technology Application Conference, Taipei, Taiwan, 2020/04/24.
• Fu-Hsuan Chang, Yi-Jen Chen, Wu Yen-Lan, Ya-Fen Wu, “Smart Recycling Bin Design,” 2020 Optoelectronics and Communication Engineering Application Conference, Kaohsiung, Taiwan, 2020/11/27.
• Che-Ting Kuo, Jiunn-Chyi Lee, Yi Chen, Ya-Fen Wu, “Structural Properties of Hydrothermally Grown ZnO Nanostructures,” 8th International Conference on Engineering and Innovative Materials (ICEIM 2019), Tokyo, Japan, 2019/09/06.
• Jing-Wun Syu, Che-Ting Kuo, Jiunn-Chyi Lee, Zong-Liang Tseng, Ya-Fen Wu, “Carrier Dynamics Study of CH3NH3PbI3 Perovskite Thin Films,” TACT 2019 International Thin Film Conference, Taipei, Taiwan, 2019/11/17.
• Yi-Hui Chen, Ya-Liang Lin, Zong-Liang Tseng, Hung-Pin Hsu, Ya-Fen Wu, “Temperature-Dependent Photoluminescence of Organometal Halide Perovskite,” International Symposium on Novel and Sustainable Technology, Tainan, Taiwan, 2018/10/04.
• Ya-Liang Lin, Yi-Hui Chen, Zong-Liang Tseng, Hung-Pin Hsu, Ya-Fen Wu, “Optical Properties of Organometal Halide Perovskite Films,” International Symposium on Novel and Sustainable Technology, Tainan, Taiwan, 2018/10/04.
• Ya-Fen Wu, Yi Chen, “Structural and Optical Properties of ZnO Nanostructures,” IEEE International Conference on Advanced Manufacturing, Yunlin, Taiwan, 2018/11/16.
• Ya-Fen Wu, Zeng Yu-Feng, Zhan Jun-Yao, “Bluetooth Anti-Theft Electronic Lock,” 16th Formosa Plastics Group Application Technology Conference, New Taipei City, Taiwan, 2018/06/14.
• Ya-Fen Wu, Jiunn-Chyi Lee, “Optical Characterization of Quaternary AlInGaN Multiquantum Wells,” 6th International Conference on Advanced Materials and Engineering Materials, Singapore, 2017/03/11.
• Hung-Pin Hsu, Yi Chen, Ya-Fen Wu, “Characterization of the Structural and Optical Properties of ZnO Nanostructures by X-ray Diffraction,” 8th International Conference and Exhibition on Materials Science and Engineering, Osaka, Japan, 2017/05/29.
• Ya-Fen Wu, Xie Bo-Yu, Zhao Yi-Fan, “EEG System Applications,” 2017 Biomedical Electronics Conference, Taipei, Taiwan, 2017/11/18.
• Ya-Fen Wu, Jiang Bo-Wei, Zhang Da-Yuan, “Arduino Home Appliance Applications,” 2017 Biomedical Electronics Conference, Taipei, Taiwan, 2017/11/18.
• Ya-Fen Wu, Chen Ze-Yu, Zheng Qi-Quan, Lu Ting-Rui, “EEG Bluetooth Control System and Applications,” 15th Formosa Plastics Group Application Technology Conference, Taoyuan, Taiwan, 2017/06/16.
• Ya-Fen Wu, Hung-Pin Hsu, Wei-You Chen, Jiunn-Chyi Lee, “Growth of ZnO and Indium-Doped ZnO Structures for Dye-Sensitized Solar Cells,” Compound Semiconductor Week 2016, Toyama, Japan, 2016/06/26.
• Ya-Fen Wu, Wei-You Chen, Hung-Pin Hsu, Jiunn-Chyi Lee, “Hydrothermal Synthesis of Flower-like ZnO Structures,” 18th International Conference on Crystal Growth and Epitaxy, Nagoya, Japan, 2016/08/07.
• Ya-Fen Wu, Yen-Ming Lai, “Cortex-M3-Based Industrial AC Motor Forward/Reverse Rotation Monitoring System,” 2016 Engineering Technology Application Conference, Taipei, Taiwan, 2016/06/03.
• Ya-Fen Wu, Ning Hui-Chung, Liao Guan-Yu, “IoT Home Appliance Control,” 14th Formosa Plastics Group Application Technology Conference, New Taipei City, Taiwan, 2016/06/24.
• Ya-Fen Wu, Su Zhi-Yang, Lu Jian-Hong, “Biomedical EEG Detection and Applications,” 14th Formosa Plastics Group Application Technology Conference, New Taipei City, Taiwan, 2016/06/24.
• Ya-Fen Wu, Jiunn-Chyi Lee, “Performances of Multi-Quantum Barriers within InGaN/GaN Multi-Quantum-Well Light-Emitting Devices,” International Conference on Advanced Manufacturing, Nantou, Taiwan, 2016/12/16.
• Ya-Fen Wu, Hung-Pin Hsu, Jiunn-Chyi Lee, Yeu-Jent Hu, Tzer-Ting Kuo, “Luminescence Mechanisms in Quaternary AlInGaN Multiple Quantum Wells,” TACT 2015 International Thin Films Conference, Tainan, Taiwan, 2015/11/15.
• Ya-Fen Wu, Hung-Pin Hsu, Jiunn-Chyi Lee, Yeu-Jent Hu, Tzer-Ting Kuo, “Thermal Annealing Effect on the Performance of Triple-Junction InGaP-Based Photovoltaic Solar Cells,” TACT 2015 International Thin Films Conference, Tainan, Taiwan, 2015/11/15.
• Ya-Fen Wu, Jiunn-Chyi Lee, Jui-Ju Hsiao, Tzer-En Nee, “Debye Behavior Analysis of InGaN/GaN Multiquantum-Well Heterostructures,” IEEE ISNE 2015, Taipei, Taiwan, 2015/05/04.
• Ya-Fen Wu, Jiunn-Chyi Lee, “Photoluminescence and Recombination Mechanisms in Nitride-Based Multiple Quantum Wells,” ICETI 2014, Pingtung, Taiwan, 2014/10/31.
• Ya-Fen Wu, Jiunn-Chyi Lee, Yeu-Jent Hu, Tzer-Ting Kuo, “Investigation on Performances of Multi-Quantum Barriers in InGaN/GaN Multi-Quantum-Well Heterostructures,” ICTMC-19, Niigata, Japan, 2014/09/01.
• Ya-Fen Wu, Yu-Wei Liu, “Study of Photoexcited Carrier Dynamics in Nitride-Based Wide Bandgap Semiconductors,” GTEA 2014, Taichung, Taiwan, 2014/05/21.
• Ya-Fen Wu, Hung-Ing Chen, Jui-Ju Hsiao, Jen-Cheng Wang, Chia-Hui Fang, Yi-Jen Huang, Bing-Yuh Lu, Tzer-En Nee, “Strain Effects on Optical Properties of ZnO Nanostructures Grown by Hydrothermal Method,” ISNE 2014, Taoyuan, Taiwan, 2014/05/07.
• Ya-Fen Wu, Jiunn-Chyi Lee, Jeng-Kuang Huang, Ming-Tse Kuo, Hung-You Wu, “High-Temperature Electroluminescence of Multi-Quantum Barriers within InGaN/GaN MQW LEDs,” International MOVPE Conference, Busan, South Korea, 2012/05/20.
• Ya-Fen Wu, Jiunn-Chyi Lee, “Carrier Relaxation and Thermal Emission in InAs/GaAs Quantum Dot Heterostructures,” International Conference on Mechanical Engineering, Materials and Energy, Beijing, China, 2012/12/20.
• Ya-Fen Wu, Jiunn-Chyi Lee, “Optical Properties of InGaN/AlGaN Multiple Quantum Wells,” International Electronics Devices and Materials Symposium, Kaohsiung, Taiwan, 2012/11/29.
• Wu, Wu-Hung-You, Kuo-Ming-Che, Yang-Peng-Hong, Liu-Yu-Wei, Huang-Jeng-Kuang, Hsu-Hung-Pin, Ya-Fen Wu, “Research on Optoelectronic Characteristics of III-V Compound Semiconductor Light-Emitting Diodes”, 2012 Taiwan Photonics Technology Conference & NSC Photonics Achievement Presentation, Taipei, Taiwan, 2012/12/6.
• Yang, Peng-Hong, Hsu, Hung-Pin, Ya-Fen Wu, Huang, Jeng-Kuang, “Optical Properties of Strained Germanium Multiple Quantum Wells”, 10th Formosa Plastics Group Applied Technology Symposium, New Taipei City, Taiwan, 2012/6/28.
• Wu, Y.-F., Lee, J.-C., Huang, J.-K., Hsu, H.-P., “Analysis of Strain Effect in InGaN/GaN Multiquantum Wells by X-Ray Diffraction”, 16th International Conference on Metal Organic Vapor Phase Epitaxy, Busan, Republic of Korea, 2012/5/20.
• Wu, Ya-Fen, Huang, Jeng-Kuang, Hsu, Hung-Pin, Lee, Jiunn-Chyi, Kuo, Ming-Tse, Liou, Yi-Yan, Yang, Pong-Hong, Wu, Hung-You, “Characterization of CuIn1-xGaxSe2 Thin Films by X-ray Diffraction Line Profile Analysis”, International Symposium on Nano Science and Technology, Tainan, Taiwan, 2011/11/18–11/19.
• Wu, Guo-Hao, Zhang, Ming-Ren, Chen, Chia-Mao, Huang, Jeng-Kuang, Hsu, Hung-Pin, Ya-Fen Wu, “Multifunctional Temperature Control System”, 2011 Mechatronics Technology Application Conference Proceedings, Taipei, Taiwan, 2011/7/27.
• Liu, Zong-You, Zhang, Kai-Lun, Guo, Bo-Xiang, Chen, Guan-Yu, Ya-Fen Wu, Li, Chun-Chi, “Multifunctional Smart Helmet System”, 2011 Mechatronics Technology Application Conference Proceedings, Taipei, Taiwan, 2011/7/27.
• Liu, Guo-Fen, Ya-Fen Wu, Chen, Bo-Xun, Liu, Yi-Yan, Dai, Pei-Yang, “Vehicle Safety Distance Measurement System”, 2011 Mechatronics Technology Application Conference Proceedings, Taipei, Taiwan, 2011/7/27.
• Wu, Ya-Fen, Hsu, Hung-Pin, Huang, Jeng-Kuang, Lee, Jiunn-Chyi, Tsai, Ming-Hsien, “Photoluminescence and Photoreflectance Studies of Co-evaporated CuIn1-xGaxSe2 Thin Films”, 13th International Conference on the Formation of Semiconductor Interfaces (ICFSI-13), Prague, Czech Republic, 2011/7/3–7/8.
• Wu, Ya-Fen, Hsu, Hung-Pin, Huang, Jeng-Kuang, Tsai, Ming-Hsien, “Characterization of Self-assembled InAs/GaAs Quantum Dot Heterostructures”, 9th Formosa Plastics Group Applied Technology Symposium, Taoyuan, Taiwan, 2011/6/24.
• Wu, Ya-Fen, Huang, Jeng-Kuang, Lee, Jiunn-Chyi, “X-ray Diffraction Analysis of Self-ordered Porous Anodic Alumina”, IEEE International Nanoelectronics Conference (IEEE INEC 2011), Taoyuan, Taiwan, 2011/6/21–6/24.
• Wu, Ya-Fen, Huang, Jeng-Kuang, Tzeng, Wei-Shiang, Lee, Jiunn-Chyi, “Heating Effect on Electroluminescence Spectra of InGaN/GaN Heterostructures”, IEEE-NEMS 2011, Kaohsiung, Taiwan, 2011/2/20–2/23.
• Lee, Jiunn-Chyi, Hu, Yeu-Jent, Huang, Jeng-Kuang, Tzeng, Wei-Shiang, Wu, Ya-Fen, “Carrier Localization Effect on Luminescence Spectra of III-V Heterostructures”, International Conference on Optics and Photonics inTaiwan, Tainan, Taiwan, 2010/12.
• Lee, Jiunn-Chyi, Hu, Yeu-Jent, Huang, Jeng-Kuang, Wu, Ya-Fen, “Nanostructure of Self-ordered Porous Anodic Alumina Revealed by X-ray Diffraction”, Thin Films 2010 Conference, Harbin, China, 2010/7.
• Lee, Jiunn-Chyi, Hu, Yeu-Jent, Huang, Jeng-Kuang, Lee, Ming-Zhi, Wu, Ya-Fen, “Spontaneous Emission Mechanisms of Localized-State Heterosystem”, Thin Films 2010 Conference, Harbin, China, 2010/7.
• Wu, Ya-Fen, Hsieh, Tsang-Yen, et al., “High Resolution X-ray Diffraction Analysis of InGaN/GaN Quantum Wells”, TACT 2009 International Thin Films Conference, Taipei, Taiwan, 2009/12/14–12/16.
• Wu, Ya-Fen, Lee, Jiunn-Chyi, Hu, Yeu-Jent, Huang, Jeng-Kuang, Hsieh, Tsang-Yen, “Thermal Effect of Multi-quantum Barriers in InGaN/GaN Multi-quantum Well Light-emitting Diodes”, TACT 2009 International Thin Films Conference, Taipei, Taiwan, 2009/12/14–12/16.
• Lee, Jiunn-Chyi, Hu, Yeu-Jent, Huang, Jeng-Kuang, Hsieh, Tsang-Yen, Wu, Ya-Fen, “X-ray Diffraction Study on Structural Properties of InGaN/GaN Multiple Quantum Wells”, ChinaNANO 2009, Beijing, China, 2009/9/1–9/3.
• Wu, Ya-Fen, Lee, Jiunn-Chyi, Hu, Yeu-Jent, Huang, Jeng-Kuang, Hsieh, Tsang-Yen, Wang, Yi-Ping, Lee, Ming-Zhi, “Improvement of Radiative Efficiency by Multi-quantum Barriers in InGaN/GaN LEDs”, International Conference on Smart Materials and Nanotechnology, Weihai, China, 2009/7/8–7/11.

（4）Patents

• Wu, Ya-Fen, “Smart Helmet with Head-Up Display”, Taiwan Utility Model Patent No. M408685, August 2011.
• Wu, Ya-Fen, “Intelligent Unmanned Counter Food Vending System”, Taiwan Utility Model Patent No. M394519, December 2010.
• Wu, Ya-Fen, “Multi-function Ruler with Detachable Lighting and Utility Blade”, Taiwan Utility Model Patent No. M390232, October 2010.
• Wu, Ya-Fen, “Smart Seat Device for Public Transportation”, Taiwan Utility Model Patent No. M383347, July 2010.
• Wu, Ya-Fen, “Priority Seat Warning Device”, Taiwan Utility Model Patent No. M365895, October 2009.