Cost-Effective High-Performance Charge-Carrier-Transport-Layer-Free Perovskite Solar Cells Achieved by Suppressing Ion Migration

Tao Ye, Yuchen Hou, Amin Nozariasbmarz, Dong Yang, Jungjin Yoon, Luyao Zheng, Ke Wang, Kai Wang, Seeram Ramakrishna, Shashank Priya

Research output: Contribution to journalArticlepeer-review

3 Scopus citations

Abstract

Perovskite solar cells (PSCs) without charge-carrier-transport layers (CTLs) are theoretically achievable due to the ambipolar charge-carrier-transfer characteristics presenting in perovskites. However, the power conversion efficiency (PCE) of the CTL-free PSCs needs further improvement. Herein, we provide a breakthrough in the fabrication of the cost-effective high-performance hole-transport-layer (HTL)-free PSC and trilayer PSC with device configurations of fluorine doped tin oxide (FTO)/SnO2/perovskite/carbon and FTO/perovskite/carbon, respectively. We introduce perfluorotetradecanoic acid (PFTeDA) with a carbonyl unit and carbon fluorine bonds to suppress the ion migration and reduce the crystal defects in perovskites. The modified carbon-based HTL-free PSC shows a record PCE of 18.9%. Furthermore, the PFTeDA molecules are found existing at the grain boundaries between the perovskite crystals, resulting in enhanced environmental, thermal, and light stabilities for the resultant cost-effective high-performance CTL-free PSCs.

Original languageEnglish (US)
Pages (from-to)3044-3052
Number of pages9
JournalACS Energy Letters
Volume6
DOIs
StatePublished - 2021

All Science Journal Classification (ASJC) codes

  • Chemistry (miscellaneous)
  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Materials Chemistry

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