tailieunhanh - Báo cáo hóa học: " Investigation on Photovoltaic Performance based on Matchstick-Like Cu2S–In2S3 Heterostructure Nanocrystals and Polymer"

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: Investigation on Photovoltaic Performance based on Matchstick-Like Cu2S–In2S3 Heterostructure Nanocrystals and Polymer | Nanoscale Res Lett 2008 3 502-507 DOI S11671-008-9187-4 NANO EXPRESS Investigation on Photovoltaic Performance based on Matchstick-Like Cu2S-In2S3 Heterostructure Nanocrystals and Polymer Aiwei Tang Feng Teng Yan Wang Yanbing Hou Wei Han Luoxin Yi Mingyuan Gao Received 11 August 2008 Accepted 3 October 2008 Published online 25 October 2008 to the authors 2008 Abstract In this paper we synthesized a novel type II cuprous sulfide Cu2S -indium sulfide In2S3 heterostructure nanocrystals with matchstick-like morphology in pure dodecanethiol. The photovoltaic properties of the heterostructure nanocrystals were investigated based on the blends of the nanocrystals and poly 2-methoxy-5- 2 -ethylhexoxy -p-phenylenevinylene MEH-PPV . In comparison with the photovoltaic properties of the blends of Cu2S or In2S3 nanocrystals alone and MEH-PPV the power conversion efficiency of the hybrid device based on blend of Cu2S-In2S3 and MEH-PPV is enhanced by 3-5 times. This improvement is consistent with the improved exciton dissociation or separation and better charge transport abilities in type II heterostructure nanocrystals. Keywords Photovoltaic performance Heterostructure nanocrystals Cu2S-In2S3 MEH-PPV Charge-transfer A. Tang F. Teng Y. Wang Y. Hou Key Laboratory of Luminescence and Optical Information Ministry of Education Institute of Optoelectronic Technology Beijing JiaoTong University Beijing 100044 People s Republic of China e-mail ybhou@ A. Tang e-mail awtangbjtu@ W. Han L. Yi M. Gao Institute of Chemistry Chinese Academy of Sciences Zhong Guan Cun Bei Yi Jie 2 Beijing 100080 People s Republic of China e-mail gaomy@ Introduction Since 1996 Greenham et al 1 reported the photovoltaic device based on inorganic nanocrystals and conjugated polymer hybrid photovoltaic devices fabricated by incorporating inorganic nanocrystals such as CdSe 2-4 CdS 5 CdSexTe1_x 6 CuInS2 7 ZnO 8 9 TiO2 10 11 PbS 12 and so on into conjugated polymer matrixes