• 文献标题:   Efficiency Enhancement of Perovskite Solar Cells through Fast Electron Extraction: The Role of Graphene Quantum Dots
  • 文献类型:   Article
  • 作  者:   ZHU ZL, MA JA, WANG ZL, MU C, FAN ZT, DU LL, BAI Y, FAN LZ, YAN H, PHILLIPS DL, YANG SH
  • 作者关键词:  
  • 出版物名称:   JOURNAL OF THE AMERICAN CHEMICAL SOCIETY
  • ISSN:   0002-7863
  • 通讯作者地址:   Beijing Normal Univ
  • 被引频次:   383
  • DOI:   10.1021/ja4132246
  • 出版年:   2014

▎ 摘  要

We report on a significant power conversion efficiency improvement of perovskite solar cells from 8.81% to 10.15% due to insertion of an ultrathin graphene quantum dots (GQDs) layer between perovskite and TiO2. A strong quenching of perovskite photoluminescence was observed at similar to 760 nm upon the addition of the GQDs, which is pronouncedly correlated with the increase of the IPCE and the APCE of the respective cells. From the transient absorption measurements, the improved cell efficiency can be attributed to the much faster electron extraction with the presence of GQDs (90-106 ps) than without their presence (260-307 ps). This work highlights that GQDs can act as a superfast electron tunnel for optoelectronic devices.