Performanceimprovement of dual processed perovskite solar cell—acid modified ZnO nanorodswith Cl doped light harvesting layer
Performanceimprovement of dual processed perovskite solar cell—acid modified ZnO nanorodswith Cl doped light harvesting layer
复制标题
双处理钙钛矿太阳能电池的性能改进——带有Cl掺杂光收集层的酸改性ZnO纳米棒
DOI：
10.1002/er.3743
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发表时间：
2017
期刊：
影响因子：
--
通讯作者：
Hao Wang
中科院分区：
文献类型：
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作者：
Yang Xu;Bingjie Feng;Mengni Xue;Zhaosong Li;Qiu Xiong;Jun Zhang;Jinxia Duan;Xina Wang;Hao Wang
研究了ZnO纳米棒表面对钙钛矿太阳能电池制备及其性能的影响。通过控制水热生长时间和酸处理，得到了不同厚度的ZnO纳米棒阵列，并具有粗糙的表面。与未处理的样品相比，基于改性ZnO纳米棒阵列的样品在开路电压（Voc）和填充因子（FF）上表现出令人印象深刻的增加。进一步的表面形貌研究和电化学阻抗测试表明，ZnO纳米棒/CH 3 NH3 PbI 3界面的电荷复合速率得到了抑制。为了进一步提高短路电流密度（Jsc）性能，将Cl掺杂的钙钛矿晶体引入电池中。由于其较长的电子扩散长度，获得了令人印象深刻的Jscis。两种方法的最终组合与ZnO纳米棒的优化厚度一起带来了13.3%的总功率转换效率，Voc~0.92 V，Jsc~23.1 mA/cm 2，FF~ 63%。这项工作突出了太阳能电池结构中的电子传输层的表面形态及其与光吸收层的界面接触的重要性。版权所有© 2017约翰威利父子有限公司
Effect of ZnO nanorod surface on fabricating the perovskite solar cell and its performance were studied. Varied thickness of ZnO nanorod arrays with rough surface condition were achieved through the control of hydrothermal growth time and acid treatment. Samples based on modified ZnO nanorod arrays exhibit an impressive increase on the open‐circuit voltage (Voc) and fill factor (FF) compared with the untreated ones. Further research onto the surface topography and electrochemical impedance spectroscopy test indicates that the improvement should be attributed to the suppression of the charge recombination rate at the ZnO nanorod/CH3NH3PbI3interface. In order to enhance the short‐circuit current density (Jsc) performance one step further, Cl‐doped perovskite crystal was introduced into the cell. Because of its longer electron diffusion length, an impressive Jscis received. The final combination of the two methods with the optimized thickness of the ZnO nanorod brought a total power conversion efficiency of 13.3% together with Voc~0.92 V, Jsc~23.1 mA/cm2, and FF~63%. This work highlights the importance of the surface morphology of the electron transport layer and its interface contact with the light absorbing layer in a solar cell structure. Copyright © 2017 John Wiley & Sons, Ltd.