Multiple-Defect Management for Efficient Perovskite Photovoltaics
Multiple-Defect Management for Efficient Perovskite Photovoltaics
复制标题
高效钙钛矿光伏的多缺陷管理
DOI：
10.1021/acsenergylett.1c01039
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发表时间：
2021-06
影响因子：
22
通讯作者：
Wenqiang Yang
中科院分区：
文献类型：
--
作者：
Xiaoyu Yang;Deying Luo;Yue Ni;Yanju Wang;Yuzhuo Zhang;Rui Zhu;Yongguang Tu;Qihuang Gong;Haifeng Yu;Wenqiang Yang
溶液处理的多晶钙钛矿晶体表面存在各种缺陷，导致光伏输出损耗和随后的降解。有必要开发一种多功能的钝化剂，它可以同时消除多种缺陷，包括空位、间隙、反位取代和解离的I2。在这里，我们专注于多缺陷管理，通过使用三种含有吡啶的聚合物试剂的化学键来优化有缺陷的钙钛矿表面。配位键通过消化I空位来缓解扭曲的PbIx八面体，氢键稳定铵离子以消除有机空位和深能级反位缺陷。此外，从耦合的I间隙中解离的作为电子陷阱的I2可以被超分子卤键阻挡。在低缺陷钙钛矿型薄膜的基础上，平面和介孔器件的光伏效率分别提高了22.02%和23.14%，在常温下老化2200 h后，非包膜电池的光伏效率保持了原来的90%。
A variety of defects exist on the crystalline surfaces of solution-processed polycrystalline perovskites, resulting in photovoltaic output losses and subsequent degradations. It is necessary to develop a versatile passivator that can concurrently eliminate multiple defects, including vacancy, interstitial, antisite substitution, and dissociative I2. Herein, we focus on multiple-defect management to optimize defective perovskite surfaces by using three kinds of chemical bonds with a pyridine-containing polymeric agent. Coordination bonds alleviate the distorted PbIxoctahedrons by digesting I vacancies, and hydrogen bonds stabilize ammonium cations to eliminate organic vacancies and deep-level antisite defects. Furthermore, the dissociated I2acting as electron traps from the coupled I interstitials could be blocked by supramolecular halogen bonds. Based on the low-defect perovskite films, substantial increases in photovoltaic efficiencies, going up to 22.02% and 23.14%, are achieved in planar and mesoporous devices, respectively, with nonencapsulated cells retaining 90% of their original efficiencies after 2200 h of aging in ambient conditions.
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影响因子：
62.1
作者：
Cavallo G;Metrangolo P;Milani R;Pilati T;Priimagi A;Resnati G;Terraneo G
通讯作者：
Terraneo G
DOI：
10.1016/j.jmrt.2021.03.107
发表时间：
2021-05
期刊：
Journal of Materials Research and Technology
影响因子：
--
作者：
G. Murugadoss;P. Arunachalam;S. Panda;M. Rajesh Kumar;J. Rajabathar;H. Al‐Lohedan;M. D. Wasmiah
通讯作者：
G. Murugadoss;P. Arunachalam;S. Panda;M. Rajesh Kumar;J. Rajabathar;H. Al‐Lohedan;M. D. Wasmiah
影响因子：
83.5
作者：
Jingjing Xue;Rui Wang;Yang Yang-Yang
通讯作者：
Jingjing Xue;Rui Wang;Yang Yang-Yang
影响因子：
3.2
作者：
Jun Li;Kangrong Yan;Jiehuan Chen;Yingzhu Zhang;Weitao Yang;Xiaomei Lian;Gang Wu;Hongzheng Chen-Hongzheng-Ch
通讯作者：
Jun Li;Kangrong Yan;Jiehuan Chen;Yingzhu Zhang;Weitao Yang;Xiaomei Lian;Gang Wu;Hongzheng Chen-Hongzheng-Ch
影响因子：
10.8
作者：
Abate, Antonio;Saliba, Michael;Snaith, Henry J.
通讯作者：
Snaith, Henry J.