Hybrid morphology dependence of CdTe:CdSe bulk-heterojunction solar cells

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• 作者：Furui Tan (1)
  Shengchun Qu (2)
  Weifeng Zhang (1)
  Zhanguo Wang (2)
  
  1. Key Laboratory of Photovoltaic Materials ; Department of Physics and Electronics ; Henan University ; Kaifeng ; 475004 ; People鈥檚 Republic of China
  2. Key Laboratory of Semiconductor Materials Science ; Institute of Semiconductors ; Chinese Academy of Sciences ; Beijing ; 100083 ; People鈥檚 Republic of China
  
• 关键词：Hybrid bulk ; heterojunction solar cells ; CdSe ; CdTe
• 刊名：Nanoscale Research Letters
• 出版年：2014
• 出版时间：December 2014
• 年：2014
• 卷：9
• 期：1
• 全文大小：2,328 KB
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• 刊物主题：Nanotechnology; Nanotechnology and Microengineering; Nanoscale Science and Technology; Nanochemistry; Molecular Medicine;
• 出版者：Springer US
• ISSN：1556-276X

文摘

A nanocrystal thin-film solar cell operating on an exciton splitting pattern requires a highly efficient separation of electron-hole pairs and transportation of separated charges. A hybrid bulk-heterojunction (HBH) nanostructure providing a large contact area and interpenetrated charge channels is favorable to an inorganic nanocrystal solar cell with high performance. For this freshly appeared structure, here in this work, we have firstly explored the influence of hybrid morphology on the photovoltaic performance of CdTe:CdSe bulk-heterojunction solar cells with variation in CdSe nanoparticle morphology. Quantum dot (QD) or nanotetrapod (NT)-shaped CdSe nanocrystals have been employed together with CdTe NTs to construct different hybrid structures. The solar cells with the two different hybrid active layers show obvious difference in photovoltaic performance. The hybrid structure with densely packed and continuously interpenetrated two phases generates superior morphological and electrical properties for more efficient inorganic bulk-heterojunction solar cells, which could be readily realized in the NTs:QDs hybrid. This proved strategy is applicable and promising in designing other highly efficient inorganic hybrid solar cells.