tailieunhanh - Báo cáo hóa học: " Effect of ZnCdTe-Alloyed Nanocrystals on Polymer–Fullerene Bulk Heterojunction Solar Cells"

Tuyển tập báo cáo các nghiên cứu khoa học quốc tế ngành hóa học dành cho các bạn yêu hóa học tham khảo đề tài: Effect of ZnCdTe-Alloyed Nanocrystals on Polymer–Fullerene Bulk Heterojunction Solar Cells | Nanoscale Res Lett 2009 4 674-679 DOI s11671-009-9293-y NANO EXPRESS Effect of ZnCdTe-Alloyed Nanocrystals on Polymer-Fullerene Bulk Heterojunction Solar Cells Yan Wang Yanbing Hou Aiwei Tang Zhihui Feng Bin Feng Yan Li Feng Teng Received 14 January 2009 Accepted 5 March 2009 Published online 26 March 2009 to the authors 2009 Abstract The photovoltaic properties of solar cell based on the blends of poly 2-methoxy-5- 2-ethylhexoxy-1 4-phenylenevinylene MEH-PPV fullerene C60 and ZnCdTe-alloyed nanocrystals were investigated. Comparing the spectral response of photocurrent of the MEH-PPV C60 ZnCdTe nanocomposite device with that of the devices based on MEH-PPV C60 and pristine MEH-PPV one can find that the nanocomposite device exhibits an enhanced photocurrent. In comparing the composite devices with different ZnCdTe MEH-PPV C60 weight ratios of 10 wt D1-1 20 wt D1-2 40 wt D1-3 and 70 wt D1-4 it was found that the device D1-3 exhibits the best performance. The power conversion efficiency g is improved doubly compared with that of the MEH-PPV C60 device. Keywords ZnCdTe Alloy Nanocrystals Heterojuction Solar cell Introduction In the past decades polymer solar cells have attracted more and more scientific attention due to their advantages such as low cost light weight easy fabrication and the possibility to fabricate flexible devices compared with inorganic solar cells 1-5 . However the limited dissociation of photoexcitation at weak electric field and poor charge Y. Wang Y. Hou El A. Tang Z. Feng B. Feng Y. Li F. Teng Key Laboratory of Luminescence and Optical Information Ministry of Education Institute of Optoelectronic Technology Beijing Jiaotong University Beijing 100044 China e-mail ybhou@ transport in the polymer affects their applications. Along with the discovery of photo-induced fast charge transfer between conjugated polymer and C60 the possibility of all plastic photovoltaic cells with conjugated polymers and C60 derivatives as basic .