Details

Autor(en) / Beteiligte

• Yu, Bingcheng
• Shi, Jiangjian
• Tan, Shan
• Cui, Yuqi
• Zhao, Wenyan
• Wu, Huijue
• Luo, Yanhong
• Li, Dongmei
• Meng, Qingbo

Titel

Efficient (>20 %) and Stable All‐Inorganic Cesium Lead Triiodide Solar Cell Enabled by Thiocyanate Molten Salts

Ist Teil von

• Angewandte Chemie International Edition, 2021-06, Vol.60 (24), p.13436-13443

Auflage

International ed. in English

Ort / Verlag

Germany: Wiley Subscription Services, Inc

Erscheinungsjahr

2021

Quelle

Alma/SFX Local Collection

Beschreibungen/Notizen

• Besides widely used surface passivation, engineering the film crystallization is an important and more fundamental route to improve the performance of all‐inorganic perovskite solar cells. Herein, we have developed a urea‐ammonium thiocyanate (UAT) molten salt modification strategy to fully release and exploit coordination activities of SCN− to deposit high‐quality CsPbI3 film for efficient and stable all‐inorganic solar cells. The UAT is derived by the hydrogen bond interactions between urea and NH4+ from NH4SCN. With the UAT, the crystal quality of the CsPbI3 film has been significantly improved and a long single‐exponential charge recombination lifetime of over 30 ns has been achieved. With these benefits, the cell efficiency has been promoted to over 20 % (steady‐state efficiency of 19.2 %) with excellent operational stability over 1000 h. These results demonstrate a promising development route of the CsPbI3 related photoelectric devices. A new urea‐ammonium thiocyanate (UAT) molten salt was introduced as the additive in all‐inorganic cesium lead triiodide solar cell, as a modification strategy to fully release and exploit coordination activities of SCN− to deposit high‐quality CsPbI3 film. Thus, the UAT‐based devices can provide an encouraging PCE up to 20.08 % with excellent operational stability of over 1000 h.