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Highly Efficient and Stable Wide-Bandgap Perovskite Solar Cells via Strain Management
Advanced Functional Materials ( IF 18.5 ) Pub Date : 2023-01-03 , DOI: 10.1002/adfm.202214381
Pengjie Hang 1 , Chenxia Kan 1 , Biao Li 1 , Yuxin Yao 1 , Zechen Hu 1 , Yiqiang Zhang 2 , Jiangsheng Xie 3 , Ying Wang 1 , Deren Yang 1 , Xuegong Yu 1
Affiliation  

Wide-bandgap (WBG) perovskite solar cells (PSCs) with high performance and stability are in considerable demand to boost tandem solar cell efficiencies. Perovskite bandgap broadening results in a high barrier for enhancing the efficiency of PSCs and phase segregation in perovskite. In this study, it is shown that the residual strain is the key factor affecting the WBG perovskite device efficiency and stability. The dimethyl sulfoxide addition helps lead halide with opening the layer spacing to form intermediate phases that provide more nucleation sites to eliminate lattice mismatch with organic components, which dominates the strain effects on the WBG perovskite growth in a sequential deposition. By minimizing the strain, 1.67 and 1.77 eV nip devices with record efficiencies of 22.28% and 20.45%, respectively, can be achieved. The greatly suppressed phase segregation enables the devices with retained 90–95% of initial efficiency over 4000 h of damp stability and 80–90% of initial efficiency over 700 h of maximum-power-point (MPP) stability. Besides, the 1.67 eV pin devices can achieve a competitive 22.3% efficiency with considerable damp-heat, pre-ultraviolet (pre-UV) aging and MPP tracking stability according to IEC 61215. The final efficiency of more than 28.3% for the perovskite/Si tandem is obtained.

中文翻译:

通过应变管理实现高效稳定的宽带隙钙钛矿太阳能电池

具有高性能和稳定性的宽带隙 (WBG) 钙钛矿太阳能电池 (PSC) 对提高串联太阳能电池的效率有相当大的需求。钙钛矿带隙展宽导致提高 PSC 效率和钙钛矿相分离的高势垒。在这项研究中,表明残余应变是影响 WBG 钙钛矿器件效率和稳定性的关键因素。二甲基亚砜的添加有助于卤化铅打开层间距以形成中间相,从而提供更多的成核位点以消除与有机成分的晶格失配,这在连续沉积中主导了对 WBG 钙钛矿生长的应变效应。通过最小化应变,可以实现 1.67 和 1.77 eV 的 nip 器件,效率分别达到创纪录的 22.28% 和 20.45%。极大抑制的相分离使器件在 4000 小时的潮湿稳定性中保持 90-95% 的初始效率,在 700 小时的最大功率点 (MPP) 稳定性中保持 80-90% 的初始效率。此外,根据 IEC 61215,1.67 eV 引脚器件可实现具有竞争力的 22.3% 效率,并具有相当大的湿热、紫外线前(紫外线前)老化和 MPP 跟踪稳定性。钙钛矿 / 的最终效率超过 28.3%获得Si串联。
更新日期:2023-01-03
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