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首页> 外文期刊>Solar Energy >Large guanidinium cation enhance photovoltage for perovskite solar cells via solution-processed secondary growth technique
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Large guanidinium cation enhance photovoltage for perovskite solar cells via solution-processed secondary growth technique

机译：大胍盐阳离子通过溶液处理二次生长技术提高钙钛矿太阳能电池的光电压

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Recently, perovskite solar cells (PSCs) have been rapidly developed, counting as the most promising alternative to the Si solar cells, but non-radiative charge carrier recombination at grain boundaries limited open circuit voltages and consequent performance improvements of perovskite solar cells. In this work, a new perovskite film growth method was presented here using the organic molecule guanidinium (CH6N3+, Gua) to assist the secondary growth after the formation of perovskite films. It is found that the presence of Gua molecules at the interface between the perovskite film and the hole conductor layer increases all photovoltaic properties, in particular V-oc as well as the operational stability of the PSCs. The optimum performance of the planar perovskite solar cells demonstrated a PCE of 18.54% with a higher V-oc of 1.10 V and potent stability for 30 days in dark under dry condition, These results presented a simple method for suppressing non-radiative charge carrier loss in hybrid perovskite solar cells to further enhance the device performance toward highly efficient solar cells.
机译：近年来，钙钛矿太阳能电池（PSC）迅速发展，被认为是Si太阳能电池的最有希望的替代品，但是在晶界处的非辐射载流子复合限制了开路电压，从而改善了钙钛矿太阳能电池的性能。在这项工作中，这里提出了一种新的钙钛矿薄膜生长方法，该方法使用有机分子胍盐（CH6N3 +，Gua）协助钙钛矿薄膜形成后的二次生长。发现钙钛矿膜和空穴导体层之间的界面处存在Gua分子会增加所有光伏性能，特别是V-oc以及PSC的操作稳定性。平面钙钛矿太阳能电池的最佳性能证明其PCE为18.54％，V-oc较高，为1.10 V，并且在干燥条件下于黑暗中具有30天的稳定稳定性。这些结果提出了一种抑制非辐射载流子损失的简单方法在混合钙钛矿太阳能电池中的应用，可进一步提高器件性能，使其更高效。

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