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Title: Efficient DPP Donor and Nonfullerene Acceptor Organic Solar Cells with High Photon‐to‐Current Ratio and Low Energetic Loss

Journal Article · · Advanced Functional Materials
ORCiD logo [1];  [1];  [2];  [1];  [3];  [3];  [2];  [1]
  1. King Abdullah University of Science and Technology (KAUST) Division of Physical Sciences and Engineering (PSE) KAUST Solar Center (KSC) Thuwal 23955‐6900 Saudi Arabia
  2. Department of Physics, Organic and Carbon Electronics Lab (ORaCEL) North Carolina State University Raleigh NC 27695 USA
  3. State Key Laboratory of Organic‐Inorganic Composites Beijing University of Chemical Technology Beijing 100029 P. R. China

Abstract The high crystallinity and ability to harvest near‐infrared photons make diketopyrrolopyrrole (DPP)‐based polymers one of the most promising donors for high performing organic solar cells (OSCs). However, DPP‐based OSC devices still suffer from the trade‐off between energetic loss ( E loss ) and maximum external quantum efficiency (EQE max ), which significantly hinders their potential. Thus far, the replacement of fullerenes with small molecule acceptors did not wisdom the performance development of DPP‐donor‐based solar cells due to severe charge recombination issues. In this work, efficient DPP‐based solar cells are reported using low bandgap fused ring electron acceptor, IEICO‐4F. PBDTT‐DPP:IEICO‐4F OSC devices deliver a champion power conversion efficiency of 9.66% with successful interface engineering along with low E loss of 0.57 eV and a high EQE max (>70%).

Sponsoring Organization:
USDOE
Grant/Contract Number:
DE‐AC02‐05CH11231
OSTI ID:
1528648
Journal Information:
Advanced Functional Materials, Journal Name: Advanced Functional Materials Vol. 29 Journal Issue: 34; ISSN 1616-301X
Publisher:
Wiley Blackwell (John Wiley & Sons)Copyright Statement
Country of Publication:
Germany
Language:
English

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