Size modulation and heterovalent doping facilitated hybrid organic and perovskite quantum dot bulk heterojunction solar cells

Yuhao Li, Shu Zhou, Zhiyu Xiong, Minchao Qin, Kuan Liu, Guilong Cai, Han Wang, Shenghe Zhao, Gang Li, Yao Jane Hsu, Jianbin Xu, Xinhui Lu

Research output: Journal article publicationJournal articleAcademic researchpeer-review

4 Citations (Scopus)

Abstract

Organic photovoltaics and halide perovskite solar cells are both solution-processable third-generation photovoltaic devices (PVs) attracting enormous research attention. In this study, we demonstrate a hybrid organic and perovskite PV device by mixing all-inorganic CsPbI3 quantum dots (QDs) into the conventional organic bulk heterojunction active layer of PBDB-T:IT-M. It is found that the charge transfer properties between QDs and organic donor/acceptor interfaces can be fine-tuned with the size modulation and the heterovalent bismuth (Bi) doping of perovskite QDs, leading to an increase in open-circuit voltage. In addition, the incorporation of perovskite QDs with different sizes could effectively modify the nanoscale bulk heterojunction morphology toward more efficient charge collection and thus a higher fill factor. The photocurrent of the devices can also be improved through Rayleigh scattering and light absorption of the QDs. As a result, a noticeable enhancement in device performance has been achieved by the PBDB-T:IT-M with 10 nm Bi-doped CsPbI3 QD device. This work provides one feasible route to fine-tune the energy level alignment and nanophase separation by integrating these two promising PV materials.

Original languageEnglish
Pages (from-to)11359-11367
Number of pages9
JournalACS Applied Energy Materials
Volume3
Issue number11
DOIs
Publication statusPublished - 23 Nov 2020

Keywords

  • Charge transfer
  • Heterovalent doping
  • Hybrid organic and perovskite solar cells
  • Perovskite quantum dot
  • Size modulation

ASJC Scopus subject areas

  • Chemical Engineering (miscellaneous)
  • Energy Engineering and Power Technology
  • Electrochemistry
  • Electrical and Electronic Engineering
  • Materials Chemistry

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