Integrated 4-Terminal All-Inorganic Perovskite Tandem Solar Cell with Open-Circuit Voltage Exceeding 2.1 V for Water Splitting,ACS Energy Letters

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Integrated 4-Terminal All-Inorganic Perovskite Tandem Solar Cell with Open-Circuit Voltage Exceeding 2.1 V for Water Splitting
ACS Energy Letters ( IF 19.3 ) Pub Date : 2022-10-31 , DOI: 10.1021/acsenergylett.2c02262
Qiang Sun ₁ , Zhiguo Zhang ₁ , Tao Zhang ₁ , Yao Feng ₁ , Anjie Gu ₁ , Haixuan Yu ₁ , Miaomiao Zhang ₁ , Xiao Li Zhang ₂ , Jun Zhu ₃ , Yan Shen ₁ , Mingkui Wang _{1,

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Affiliation

This work reports on Sn-Pb binary metal inorganic perovskites as narrow-bandgap absorbers for integrated 4-terminal all-inorganic perovskite tandem solar cells (TSCs). A series of Sn-Pb binary metal CsPb_1–xSn_xI_3-yBr_y inorganic perovskites with tunable bandgaps ranging from 1.28 to 1.45 eV were synthesized through tuning the Sn-Pb and I-Br contents. The TSC device using a narrow-bandgap CsPb_0.5Sn_0.5I_2.7Br_0.3 bottom cell with a wide-bandgap semi-transparent CsPbI_1.5Br_1.5 top cell achieved a remarkable power conversion efficiency over 18% and a high open-circuit voltage (V_OC) of 2.13 V, a very attractive feature for solar fuel production. To the best of our knowledge, this is the first trial of TSCs entirely made of all-inorganic perovskite absorbers, and also the record V_OC achieved among double-junction TSCs based on integration of narrow- and wide-bandgap perovskite absorbers so far. Using this novel all-inorganic perovskite TSC in conjunction with a water-splitting system employing Pt/C for hydrogen evolution reaction and Fe/Ni foam for oxygen evolution reaction in alkaline electrolyte, we achieved an unprecedented solar-to-hydrogen efficiency over 13% under standard illumination test conditions.

中文翻译：

集成四端全无机钙钛矿叠层太阳能电池，开路电压超过 2.1 V 用于分解水

这项工作报告了 Sn-Pb 二元金属无机钙钛矿作为集成 4 端全无机钙钛矿串联太阳能电池 (TSC) 的窄带隙吸收剂。通过调节 Sn-Pb 和 I-Br 的含量，合成了一系列具有 1.28 至 1.45 eV 可调带隙的 Sn-Pb 二元金属CsPb _{1– x} Sn _x I _{3- y Br}_{y无机钙钛矿。}使用窄带隙 CsPb _0.5 Sn _0.5 I _2.7 Br _0.3底部电池和宽带隙半透明 CsPbI _1.5 Br _{1.5的 TSC 器件}top cell 实现了超过 18% 的卓越功率转换效率和 2.13 V 的高开路电压 ( V _OC )，这对于太阳能燃料生产来说是一个非常有吸引力的特性。据我们所知，这是完全由全无机钙钛矿吸收剂制成的 TSC 的首次试验，也是迄今为止基于窄带隙和宽带隙钙钛矿吸收剂集成的双结 TSC 所取得的V _OC记录。将这种新型全无机钙钛矿 TSC 与采用 Pt/C 用于析氢反应和 Fe/Ni 泡沫用于碱性电解液中的析氧反应的水分解系统相结合，我们实现了前所未有的超过 13% 的太阳能制氢效率在标准照明测试条件下。

更新日期：2022-10-31

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