Monolithic perovskite‐carrier selective contact silicon tandem solar cells using molybdenum oxide as a hole selective layer

Hoyoung Song, Changhyun Lee, Jiyeon Hyun, Sang Won Lee, Dongjin Choi, Dowon Pyun, Jiyeon Nam, Seok Hyun Jeong, Jiryang Kim, Soohyun Bae, Hyunju Lee, Yoon Mook Kang, Donghwan Kim, Haeseok Lee

Research output: Contribution to journalArticlepeer-review

Abstract

Monolithic perovskite–silicon tandem solar cells with MoOx hole selective contact silicon bottom solar cells show a power conversion efficiency of 8%. A thin 15 nm‐thick MoOx contact to n‐ type Si was used instead of a standard p+ emitter to collect holes and the SiOx/n+ poly‐Si structure was deposited on the other side of the device for direct tunneling of electrons and this silicon bottom cell structure shows ~15% of power conversion efficiency. With this bottom carrier selective silicon cell, tin oxide, and subsequent perovskite structure were deposited to fabricate monolithic tandem solar cells. Monolithic tandem structure without ITO interlayer was also compared to confirm the role of MoOx in tandem cells and this tandem structure shows the power conversion efficiency of 3.3%. This research has confirmed that the MoOx layer simultaneously acts as a passivation layer and a hole collecting layer in this tandem structure.

Original languageEnglish
Article number3108
JournalEnergies
Volume14
Issue number11
DOIs
Publication statusPublished - 2021

Keywords

  • Carrier selective contact
  • Hole selective layer
  • Molybdenum oxide
  • Monolithic tandem cell
  • Perovskite–silicon tandem solar cell

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Energy (miscellaneous)
  • Control and Optimization
  • Electrical and Electronic Engineering

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