期刊
SOLAR RRL
卷 4, 期 11, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/solr.202000390
关键词
carbon electrodes; europium doping; inorganic perovskites; solar cells
资金
- National Natural Science Foundation of China [51702375]
- Fundamental Research Foundations for the Central Universities [191gpy05, 201gpy04]
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 CsPbBr(3)perovskites are doped with Eu2+ 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 Eu2+ 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 VOC of 1.45 V by optimizing the doping concentration of Eu2+. 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.
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