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Post‐Treatment of Mesoporous Scaffolds for Enhanced Photovoltage of Triple‐Mesoscopic Perovskite Solar Cells
Solar RRL ( IF 6.0 ) Pub Date : 2020-06-14 , DOI: 10.1002/solr.202000185 Yusong Sheng 1 , Wenxian Ji 1 , Yanmeng Chu 1 , Yue Ming 1 , Anyi Mei 1 , Yue Hu 1 , Yaoguang Rong 1 , Hongwei Han 1
Solar RRL ( IF 6.0 ) Pub Date : 2020-06-14 , DOI: 10.1002/solr.202000185 Yusong Sheng 1 , Wenxian Ji 1 , Yanmeng Chu 1 , Yue Ming 1 , Anyi Mei 1 , Yue Hu 1 , Yaoguang Rong 1 , Hongwei Han 1
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Triple‐mesoscopic perovskite solar cells (PSCs) based on TiO2/ZrO2/carbon architecture have attracted much attention due to their excellent long‐term stability and screen‐printing technique‐based fabrication process. However, the relatively low open‐circuit voltage (VOC) limits the further improvement of power conversion efficiency (PCE) for triple‐mesoscopic PSCs. Herein, 2‐phenyl‐5‐benzimidazole sulfonate‐Na to post‐treat the triple‐mesoscopic structured scaffold is introduced. The conduction band of the mesoporous TiO2 layer (electron transport layer [ETL]) is significantly shifted up from −4.22 to −4.11 eV, which favors the electron transfer from the perovskite absorber to the ETL. At the same time, the recombination at the interface of ETL/perovskite is effectively suppressed. Correspondingly, the VOC and fill factor (FF) of the devices are enhanced without sacrificing the photocurrent density (JSC). With optimal post‐treatment conditions, the champion device delivers a VOC of 1.02 V and an FF of 0.70 with JSC of 23.06 mA cm−2, showing an overall PCE of 16.51%. After 1000 h continuous operation at the maximum power point under AM1.5G 1 sun illumination, the devices can maintain 91.7% of the initial efficiency. This simple procedure and significant photovoltage enhancement render this method promising for fabricating efficient PSCs based on mesoporous charge transport layers.
中文翻译：
介孔支架的后处理可增强三介观钙钛矿太阳能电池的光电压
基于TiO 2 / ZrO 2 /碳结构的三介钙钛矿太阳能电池（PSC）由于其出色的长期稳定性和基于丝网印刷技术的制造工艺而备受关注。但是，相对较低的开路电压（V OC）限制了三介观PSC的功率转换效率（PCE）的进一步提高。在此，介绍了对三镜下结构化支架进行后处理的2-苯基-5-苯并咪唑磺酸钠。介孔TiO 2的导带层（电子传输层[ETL]）从-4.22显着上移到-4.11 eV，这有利于电子从钙钛矿吸收体转移到ETL。同时，有效地抑制了ETL /钙钛矿界面上的重组。相应地，V OC的装置的和填充因子（FF）被增强，而不牺牲光电流密度（Ĵ SC）。在最佳的后处理条件下，冠军设备可提供1.02 V的V OC和0.70的FF，J SC为23.06 mA cm -2，显示整体PCE为16.51％。在AM1.5G 1阳光照射下在最大功率点连续运行1000小时后，这些设备可以维持91.7％的初始效率。这种简单的过程和显着的光电压增强使该方法有望用于制造基于介孔电荷传输层的高效PSC。
更新日期：2020-06-14
中文翻译：
介孔支架的后处理可增强三介观钙钛矿太阳能电池的光电压
基于TiO 2 / ZrO 2 /碳结构的三介钙钛矿太阳能电池（PSC）由于其出色的长期稳定性和基于丝网印刷技术的制造工艺而备受关注。但是，相对较低的开路电压（V OC）限制了三介观PSC的功率转换效率（PCE）的进一步提高。在此，介绍了对三镜下结构化支架进行后处理的2-苯基-5-苯并咪唑磺酸钠。介孔TiO 2的导带层（电子传输层[ETL]）从-4.22显着上移到-4.11 eV，这有利于电子从钙钛矿吸收体转移到ETL。同时，有效地抑制了ETL /钙钛矿界面上的重组。相应地，V OC的装置的和填充因子（FF）被增强，而不牺牲光电流密度（Ĵ SC）。在最佳的后处理条件下，冠军设备可提供1.02 V的V OC和0.70的FF，J SC为23.06 mA cm -2，显示整体PCE为16.51％。在AM1.5G 1阳光照射下在最大功率点连续运行1000小时后，这些设备可以维持91.7％的初始效率。这种简单的过程和显着的光电压增强使该方法有望用于制造基于介孔电荷传输层的高效PSC。
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