PbS-Based Quantum Dot Solar Cells with Engineered I -Conjugated Polymers Achieve 13% Efficiency

Muhibullah Al Mubarok, Febrian Tri Adhi Wibowo, Havid Aqoma, Narra Vamsi Krishna, Wooseop Lee, Du Yeol Ryu, Shinuk Cho, In Hwan Jung, Sung Yeon Jang

Research output: Contribution to journalArticlepeer-review

21 Citations (Scopus)


While hole extraction is crucial for the external quantum efficiency of conventional n-i-p colloidal quantum dot (CQD) solar cells (CQDSCs), sulfur-passivated p-Type CQDs (pCQDs) have been the best hole-Transport material (HTM) to date. In this work, we developed organic I -conjugated polymers (I -CPs) that can achieve substantially improved HTM performance compared with conventional pCQDs. A weakly electron-withdrawing triisopropylsilylethynyl (TIPS) group was employed with a weak donor moiety, benzo[1,2-b:4,5:b′]-dithiophene (BDT), in the push-pull structured I -CPs to optimize the optoelectronic properties of the HTM. The CQDSCs using TIPS-containing I -CPs achieved a PCE (13.03%) substantially higher than those previously reported using pCQD (11.33%) or I -CPs (11.25%) owing to the improved charge collection efficiency near the photoactive CQD layer/HTM interface. To the best of our knowledge, our CQDSCs using TIPS-based I -CPs achieved the highest reported PCE among SSE-free CQDSCs.

Original languageEnglish
Pages (from-to)3452-3460
Number of pages9
JournalACS Energy Letters
Issue number11
Publication statusPublished - 2020 Nov 13

Bibliographical note

Funding Information:
The authors gratefully acknowledge support from the National Research Foundation (NRF) Grant funded by the Korean Government (Grant Nos. 2020M1A2A2080746, 2019R1A2C2087218, 2016R1A5A1012966, and 2019R1A6A1A11053838).

Publisher Copyright:
© 2020 American Chemical Society. All rights reserved.

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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