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, Hae Seok Lee

Research output: Contribution to journalArticlepeer-review

8 Citations (Scopus)


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
Issue number11
Publication statusPublished - 2021

Bibliographical note

Funding Information:
Funding: This work was supported by the International Collaborative Energy Technology R&D Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP), and financial assistance was provided by the Ministry of Trade, Industry and Energy, Republic of Korea (No.20188550000450). This research was also supported by the National Research Foundation of Korea (2017M1A2A2087351) funded by the Ministry of Science, ICT and Future Planning of Korea.

Publisher Copyright:
Copyright: © 2021 by the authors. Licensee MDPI, Basel, Switzerland.


  • 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
  • Building and Construction
  • Fuel Technology
  • Engineering (miscellaneous)
  • Energy Engineering and Power Technology
  • Energy (miscellaneous)
  • Control and Optimization
  • Electrical and Electronic Engineering


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