Formation of 1-D/3-D Fused Perovskite for Efficient and Moisture Stable Solar Cells,ACS Applied Energy Materials

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Formation of 1-D/3-D Fused Perovskite for Efficient and Moisture Stable Solar Cells
ACS Applied Energy Materials ( IF 5.4 ) Pub Date : 2021-03-05 , DOI: 10.1021/acsaem.1c00028
Mritunjaya Parashar ₁ , Ranbir Singh ₁ , Kicheon Yoo ₁ , Jae-Joon Lee ₁

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Various organic cations (e.g., methylammonium (MA⁺), butylammonium (BA⁺), formamidinium (FA⁺), etc.) have been studied and used in organometallic halide perovskite solar cells (PSCs). Most of the currently used organic cations are protic in nature, which can induce acid–base reactions and, thus, lead to degradation of the perovskites. So far, the role of aprotic cations in PSCs has not been studied much. In the present study, two aprotic cations, namely, trimethylsulfonium (TMS⁺) and trimethylsulfoxonium (TMSO⁺), are introduced into lead-based PSCs to form one-dimensional/three-dimensional (TMSPbI₃)_x(MAPbI₃)_100-x and (TMSOPbI₃)_x(MAPbI₃)_100-x perovskite structures, respectively. This is shown to provide enhanced performance and moisture resistance, thus, increasing the stability and lifespan of the PSCs. The power conversion efficiencies of the (TMSPbI₃)_x(MAPbI₃)_100-x and (TMSOPbI₃)_x(MAPbI₃)_100-x devices are found to be 19.34 and 19.94%, respectively, compared to 17.11% for the pristine MAPbI₃ PSC, along with enhanced open-circuit voltages (V_OC) of 1.14 and 1.12 V, respectively, compared to 1.07 V for the pristine MAPbI₃ PSC. Furthermore, the effects of TMS⁺ and TMSO⁺ upon the perovskite structure, absorption, recombination, and film morphology are discussed in detail. The results of this study will be helpful in the exploration of sulfur-based cations for the development of more stable PSCs.

中文翻译：

1-D / 3-D熔融钙钛矿的形成，用于高效和湿润稳定的太阳能电池

已经研究了各种有机阳离子（例如，甲基铵（MA ⁺），丁基铵（BA ⁺），甲ami（FA ⁺）等）并将其用于有机金属卤化物钙钛矿太阳能电池（PSC）中。当前使用的大多数有机阳离子本质上都是质子，可引起酸碱反应，从而导致钙钛矿的降解。迄今为止，尚未对质子惰性阳离子在PSC中的作用进行过深入研究。在本研究中，两个非质子阳离子，即三甲基ulf （TMS ⁺）和三甲基s（TMSO ⁺）被引入铅基PSC中，以形成一维/三维（TMSPbI ₃）_x（MAPbI ₃）_100-x和（TMSOPbI₃）_x（MAPbI₃）_{100- x}钙钛矿结构。这表明可以提供增强的性能和防潮性，从而增加了PSC的稳定性和使用寿命。发现（TMSPbI₃）_x（MAPbI₃）_{100- x}和（TMSOPbI₃）_x（MAPbI₃）_{100- x}器件的功率转换效率分别为19.34％和19.94％，相比之下，原始器件的功率转换效率为17.11％ MAPbI₃ PSC，以及增强的开路电压（ V_OCb）分别为1.14和1.12 V，而原始MAPbI ₃ PSC的1.07V 。此外，将详细讨论TMS ⁺和TMSO ⁺对钙钛矿结构，吸收，重组和薄膜形态的影响。这项研究的结果将有助于探索基于硫的阳离子，以开发更稳定的PSC。

更新日期：2021-03-22

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