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Environmentally friendly, aqueous processed ZnO as an efficient electron transport layer for low temperature processed metal–halide perovskite photovoltaics
Inorganic Chemistry Frontiers ( IF 7 ) Pub Date : 2017-11-10 00:00:00 , DOI: 10.1039/c7qi00667e
Jiaqi Zhang 1, 2, 3, 4 , Maurizio Morbidoni 1, 2, 3, 4 , Keke Huang 5, 6, 7, 8 , Shouhua Feng 5, 6, 7, 8 , Martyn A. McLachlan 1, 2, 3, 4
Affiliation  

Here we report the incorporation of ZnO electron transport layers (ETLs), deposited using a remarkably simple water-based processing route, for use in methylammonium lead iodide (MAPI, CH3NH3PbI3) perovskite solar cells. The influence of ZnO processing temperature on the thermal stability and surface morphology of the perovskite films is studied in detail. We find that operational devices are achieved over the entire ZnO processing temperatures range investigated (100–450 °C) – however those prepared at 100 °C are significantly affected by current–voltage hysteresis. We find that the insertion of a thin phenyl-C61-butyric acid methyl ester (PCBM) layer between the ZnO and the MAPI significantly reduces current–voltage (JV) hysteresis. Additionally we determine that the thermal stability of the MAPI improves when PCBM is inserted as an interface modifier. The fabrication of the PCBM modified ZnO at 100 °C enables the formation of low-temperature processed, thermally stable normal architecture cells with negligible hysteresis.

中文翻译:

环保的水性ZnO,可作为低温加工的金属卤化物钙钛矿光伏电池的有效电子传输层

在这里,我们报告了结合使用非常简单的水基加工路线沉积的ZnO电子传输层(ETL),用于甲基铵碘化铅(MAPI,CH 3 NH 3 PbI 3)钙钛矿太阳能电池。详细研究了ZnO处理温度对钙钛矿薄膜热稳定性和表面形貌的影响。我们发现,在研究的整个ZnO加工温度范围内(100-450°C)均可实现工作器件–但是,在100°C下制备的器件会受到电流-电压迟滞的显着影响。我们发现,在ZnO和MAPI之间插入薄的苯基C 61丁酸甲酯(PCBM)薄层会显着降低电流-电压(JV)磁滞。此外,我们确定当将PCBM插入作为界面修饰剂时,MAPI的热稳定性会提高。在100°C的温度下通过PCBM改性的ZnO的制造,可以形成具有滞后作用可忽略的低温处理,热稳定的普通结构电池。
更新日期:2017-11-15
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