Europium (II)‐Doped All‐Inorganic CsPbBr3 Perovskite Solar Cells with Carbon Electrodes. Issue 11 (6th September 2020)

• Record Type: Journal Article
• Authors: Karunakaran, Santhosh Kumar; Arumugam, Gowri Manohari; Yang, Wentao; Ge, Sijie; Khan, Saqib Nawaz; Mai, Yaohua; Lin, Xianzhong; Yang, Guowei
• Is Part Of: Solar RRL. Volume 4:Issue 11(2020)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2020-09-06
• Subjects: carbon electrodes -- europium doping -- inorganic perovskites -- solar cells; Solar energy -- Periodicals; Photovoltaic power generation -- Periodicals; Solar energy -- Research -- Periodicals; Photovoltaic power generation -- Research -- Periodicals; Periodicals; 333.7923
• DOI: 10.1002/solr.202000390
• Languages: English
• ISSNs: 2367-198X

Abstract

Abstract : All‐inorganic perovskite of CsPbBr3 thin‐films solar cells has attracted increasing interest in recent years due to its potential long‐term stability over the generally used hybrid perovskites. Herein, all‐inorganic CsPbBr3 perovskites are doped with Eu 2+ to enhance the efficiency of perovskite solar cells (PVSCs). The perovskite films exhibit a better crystallinity with smooth morphology after the introduction of rare‐earth elements. Hence, the hole‐transport layer‐free device with presence of Eu 2+ and low‐cost carbon electrode achieves both enhanced efficiency and stability. In particular, the power conversion efficiency (PCE) enhances from 5.66% to 7.28% with high V OC of 1.45 V by optimizing the doping concentration of Eu 2+ . In addition, the storage stability measurements reveal excellent performances of PCE without encapsulation in air with relative humidity of 70–80%. These results can pave changes in future inorganic PVSCs. Abstract : All‐inorganic hole‐transport layer (HTL)‐free CsPbBr3 ‐based perovskite solar cells doped with Eu 2+ are studied. The decrement in trap‐state density and suppression of nonradiative recombination after doping is achieved with a higher power conversion efficiency (PCE) of 7.28% and V OC of 1.45 V.