Hybrid Tandem Quantum Dot/Organic Solar Cells with Enhanced Photocurrent and Efficiency via Ink and Interlayer Engineering

Taesoo Kim, Yuliar Firdaus, Ahmad R. Kirmani, Ru-Ze Liang, Hanlin Hu, Mengxia Liu, Abdulrahman El Labban, Sjoerd Hoogland, Pierre Beaujuge, Edward H. Sargent, Aram Amassian

Research output: Contribution to journalArticlepeer-review

24 Scopus citations

Abstract

Realization of colloidal quantum dot (CQD)/organic photovoltaic (OPV) tandem solar cells that integrate the strong infrared absorption of CQDs with large photovoltages of OPVs is an attractive option toward high-performing, low-cost thin film solar cells. To date, monolithic hybrid tandem integration of CQD/OPV solar cells has been restricted due to the CQD ink’s catastrophic damage to the organic subcell, thus forcing the low bandgap CQD to be used as front cell. This sub-optimal configuration limits the maximum achievable photocurrent in CQD/OPV hybrid tandem solar cells. In this work, we demonstrate hybrid tandem solar cells employing a low-bandgap CQD back cell on top of an organic front cell thanks to a modified CQD ink formulation and a robust interconnection layer (ICL) which together overcome the long-standing integration challenges for CQD and organic subcells. The resulting tandem architecture surpasses previously reported current densities by ~20-25% and yields a state-of-the-art power conversion efficiency (PCE) of 9.4%.
Original languageEnglish (US)
Pages (from-to)1307-1314
Number of pages8
JournalACS Energy Letters
Volume3
Issue number6
DOIs
StatePublished - May 3 2018

Fingerprint Dive into the research topics of 'Hybrid Tandem Quantum Dot/Organic Solar Cells with Enhanced Photocurrent and Efficiency via Ink and Interlayer Engineering'. Together they form a unique fingerprint.

Cite this