钙钛矿(结构)
光伏系统
光电子学
材料科学
太阳能电池理论
混合太阳能电池
聚合物太阳能电池
开路电压
有机太阳能电池
带隙
异质结
等离子太阳电池
太阳能电池
载流子
电压
化学
物理
电气工程
量子力学
结晶学
工程类
作者
Shiqi Dong,Yongsheng Liu,Ziruo Hong,En‐Ping Yao,Pengyu Sun,Meng Lei,Yuze Lin,Jinsong Huang,Gang Li,Yang Yang
出处
期刊:Nano Letters
[American Chemical Society]
日期:2017-07-31
卷期号:17 (8): 5140-5147
被引量:75
标识
DOI:10.1021/acs.nanolett.7b02532
摘要
We have demonstrated high-performance integrated perovskite/bulk-heterojunction (BHJ) solar cells due to the low carrier recombination velocity, high open circuit voltage (VOC), and increased light absorption ability in near-infrared (NIR) region of integrated devices. In particular, we find that the VOC of the integrated devices is dominated by (or pinned to) the perovskite cells, not the organic photovoltaic cells. A Quasi-Fermi Level Pinning Model was proposed to understand the working mechanism and the origin of the VOC of the integrated perovskite/BHJ solar cell, which following that of the perovskite solar cell and is much higher than that of the low bandgap polymer based organic BHJ solar cell. Evidence for the model was enhanced by examining the charge carrier behavior and photovoltaic behavior of the integrated devices under illumination of monochromatic light-emitting diodes at different characteristic wavelength. This finding shall pave an interesting possibility for integrated photovoltaic devices to harvest low energy photons in NIR region and further improve the current density without sacrificing VOC, thus providing new opportunities and significant implications for future industry applications of this kind of integrated solar cells.
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