Highly efficient prismatic perovskite solar cells†,Energy & Environmental Science

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Highly efficient prismatic perovskite solar cells†
Energy & Environmental Science ( IF 32.4 ) Pub Date : 2018-11-22 00:00:00 , DOI: 10.1039/c8ee02575d
Jiang Huang _{1,

2,

3,

4,

5} , Siheng Xiang _{1,

2,

3,

4,

5} , Junsheng Yu _{1,

2,

3,

4,

5} , Chang-Zhi Li _{6,

7,

8,

9,

10}

Affiliation

Lead halide perovskites, such as methylammonium lead iodide (MAPbI₃) can reach near 100% internal quantum efficiency in single solar cells, but they still encounter significant thermodynamic losses in photon energy to offset device photovoltage and performance. Herein, a novel prismatic perovskite solar cell with light trapping configuration, namely, Prim PVSC, is designed to mitigate such losses in devices, through modulating the pathway of light inside series cells, wherein incident high-to-low energy photons are separately captured by four horizontally aligned MAPbI_xBr_3−x subcells with varied bandgaps. This newly designed PVSC has remarkably led to a record open circuit voltage of 5.3 V in four series devices and power conversion efficiency of 21.3%, which could provide a new way to break the performance bottleneck of perovskites. Practically, this type of device architecture could also be applied in flexible modules for large-area application.

中文翻译：

高效棱柱形钙钛矿太阳能电池†

卤化钙钛矿，例如甲基铵碘化铅（MAPbI ₃）可以在单个太阳能电池中达到接近100％的内部量子效率，但是它们仍然会在光子能量中遇到显着的热力学损失，从而抵消了器件的光电压和性能。本文中，一种新颖的具有光捕获结构的棱柱形钙钛矿太阳能电池，即Prim PVSC，旨在通过调制串联电池内部的光路来减轻器件中的此类损耗，其中入射的高至低能量光子分别被捕获。四个水平对齐MAPbI _X溴_{-3- X}带隙不同的子单元。这种新设计的PVSC显着地导致了四个串联器件的创纪录的5.3 V开路电压和21.3％的功率转换效率，这可能为打破钙钛矿的性能瓶颈提供了新的途径。实际上，这种类型的设备体系结构也可以应用于大面积应用的灵活模块中。

更新日期：2018-11-22

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