Wang Liang, Miao Qingqing, Wang Dandan, Chen Mengmeng, Bi Huan, Liu Jiaqi, Baranwal Ajay Kumar, Kapil Gaurav, Sanehira Yoshitaka, Kitamura Takeshi, Ma Tingli, Zhang Zheng, Shen Qing, Hayase Shuzi
info-Powered Energy System Research Center (i-PERC), The University of Electro-Communications, 182-8585, Tokyo, Japan.
CAS Key Laboratory of Green Process and Engineering, Beijing Key Laboratory of Ionic Liquids Clean Process, Institute of Process Engineering, Chinese Academy of Sciences, 100190, Beijing, P. R. China.
Angew Chem Int Ed Engl. 2023 Aug 14;62(33):e202307228. doi: 10.1002/anie.202307228. Epub 2023 Jul 11.
The photoelectric properties of nontoxic Sn-based perovskite make it a promising alternative to toxic Pb-based perovskite. It has superior photovoltaic performance in comparison to other Pb-free counterparts. The facile oxidation of Sn to Sn presents a notable obstacle in the advancement of perovskite solar cells that utilize Sn, as it adversely affects their stability and performance. The study revealed the presence of a Sn concentration on both the upper and lower surfaces of the perovskite layer. This discovery led to the adoption of a bi-interface optimization approach. A thin layer of Sn metal was inserted at the two surfaces of the perovskite layer. The implementation of this intervention yielded a significant decrease in the levels of Sn and trap densities. The power conversion efficiency of the device was achieved at 14.31 % through the optimization of carrier transportation. The device exhibited operational and long-term stability.
无毒锡基钙钛矿的光电特性使其成为有毒铅基钙钛矿的一个有前景的替代品。与其他无铅同类材料相比，它具有卓越的光伏性能。锡容易氧化成锡，这在利用锡的钙钛矿太阳能电池的发展中是一个显著障碍，因为这会对其稳定性和性能产生不利影响。该研究揭示了钙钛矿层上下表面都存在锡浓度。这一发现促使采用双界面优化方法。在钙钛矿层的两个表面插入一层薄的锡金属。这种干预措施的实施使锡水平和陷阱密度显著降低。通过优化载流子传输，该器件的功率转换效率达到了14.31%。该器件表现出了运行稳定性和长期稳定性。
