Influence of charge transport layer on the crystallinity and charge extraction of pure tin-based halide perovskite film
Influence of charge transport layer on the crystallinity and charge extraction of pure tin-based halide perovskite film
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DOI：
10.1016/j.jechem.2022.02.003
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发表时间：
2022-02
影响因子：
13.1
通讯作者：
Yaohong Zhang;M. A. Kamarudin;Qiao Li;Chao Ding;Yong Zhou;Yingfang Yao;Z. Zou;S. Iikubo;T. Minem
中科院分区：
文献类型：
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作者：
Yaohong Zhang;M. A. Kamarudin;Qiao Li;Chao Ding;Yong Zhou;Yingfang Yao;Z. Zou;S. Iikubo;T. Minem
作为最引人注目的光伏器件之一，卤化物钙钛矿（PVK）太阳能电池在2021年实现了25.8%的功率转换效率（PCE）的新纪录。这证明了卤化物PVK太阳能电池作为光伏市场上硅基太阳能电池极具竞争力的替代品的巨大潜力[2-6]。然而，铅基卤化物PVK太阳能电池的毒性问题将导致严重的环境问题，这是其推向市场应用所面临的不可逾越的鸿沟。基于这一关注，各种无铅卤化物PVK太阳能电池得到了探索，而锡基卤化物PVK太阳能电池因其无毒、晶体结构与铅基卤化物PVK相似以及理想的带隙而备受关注[7-14]。最近，锡基卤化物PVK太阳能电池的PCE分别达到14.81%的最高水平和14.03%的认证记录。然而，锡基卤化PVK太阳能电池的PCE仍然明显低于铅基器件，这主要是由于锡基卤化PVK薄膜中的缺陷浓度较高[16,17]。锡基PVK太阳能电池的光激发载流子动力学，包括电荷分离、电荷输运和电荷萃取、界面能级排列和表面钝化等方面的基础研究，虽然对实现高PCE非常重要，但尚未进行详细的研究
As one of the most compelling photovoltaic devices, halide perovskite (PVK) solar cells have achieved a new surprising record power conversion efficiency (PCE) of 25.8% in 2021 [1]. This demonstrates the great potential of halide PVK solar cells as a highly competitive substitute to replace silicon-based solar cells in the photovoltaic market [2–6]. However, the toxicity issue of lead-based halide PVK solar cells will cause serious environmental problems which is the insurmountable gap that it faces when promoting to market applications. Based on this concern, various lead-free halide PVK solar cells have been explored, and tin-based halide PVK solar cells have received extra attention due to its nontoxicity, similar crystal structure to lead-based halide PVK and ideal bandgap [7–14]. Recently, the highest PCE of 14.81% and a certified record PCE of 14.03% have been achieved with tin-based halide PVK solar cells [15], respectively. However, the PCE of tin-based halide PVK solar cells is still significantly lower than lead-based devices, which is mostly because of the high-level defect concentration in tin-based halide PVK film [16, 17]. Fundamental studies on the photoexcited carrier dynamics including charge separation, charge transport and charge extraction, interfacial energy level alignment and surface passivation of the tin-based PVK solar cells have not been carried out in detail although they are very important for achieving high PCE. To improve the quality of tin-based halide PVK film and the performance of