Fully crystalline perovskite-perylene hybrid photovoltaic cell capable of 1.2 V output with a minimized voltage loss

被引:39
作者
Ishii, Ayumi [1 ]
Jena, Ajay Kumar [1 ]
Miyasaka, Tsutomu [1 ]
机构
[1] Toin Univ Yokohama, Grad Sch Engn, Aoba Ku, Yokohama, Kanagawa 2258503, Japan
来源
APL MATERIALS | 2014年 / 2卷 / 09期
基金
日本学术振兴会; 日本科学技术振兴机构;
关键词
HETEROJUNCTION SOLAR-CELLS; LEAD IODIDE PEROVSKITE; EFFICIENCY; TRIHALIDE; TRANSPORT; ELECTRON; ABSORBER; LENGTHS;
D O I
10.1063/1.4895039
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
A frilly crystalline heterojunction of organo-metal-halide perovskite, CH3NH3PbI3_ Clx (X < 0.24), and perylene constitutes a planar photovoltaic cell that yields a photovoltage exceeding 1.2 V with a single junction cell absorbing up to 800 nm. Here, perylene not only works as a hole conductor but also contributes to photovoltage as a photoconductor. The crystalline plane orientation of perovskite prepared on TiO2 was controlled by thermal annealing such that the lead halide (110) plane that participates in carrier conduction is highly oriented to enhance the photovoltaic performance The crystal orientation improves the heterojunction structure with perylene. For the best cell with high crystalline orientation, a total voltage loss is significantly minimized to 0.32 V with respect to the absorption band gap of 1.55 eV. The planar crystal cells generate high open-circuit voltages of 1.15-1.22 V, which is close to a theoretical maximal voltage (1.25-1.3 V) described by the Shockley-Queisser efficiency limit. The cell yielded energy conversion efficiency up to 4.96%. 0 2014 Author(s). All article content, except where otherwise noted, is licensed under a Creative Commons Attribution 3.0 Unported License.
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页数:8
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