Efficient DPP Donor and Nonfullerene Acceptor Organic Solar Cells with High Photon-to-Current Ratio and Low Energetic Loss
Type
ArticleAuthors
Song, Xin
Gasparini, Nicola
Nahid, Masrur Morshed
Paleti, Sri Harish Kumar
Li, Cheng
Li, Weiwei
Ade, Harald
Baran, Derya

KAUST Department
KAUST Solar Center (KSC)Material Science and Engineering Program
Physical Science and Engineering (PSE) Division
KAUST Grant Number
NSFC 21574138NSFC 91633301
N000141712204
Date
2019-06-20Embargo End Date
2020-06-21Permanent link to this record
http://hdl.handle.net/10754/656371
Metadata
Show full item recordAbstract
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 (Eloss) and maximum external quantum efficiency (EQEmax), 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 Eloss of 0.57 eV and a high EQEmax (>70%).Citation
Song, X., Gasparini, N., Nahid, M. M., Paleti, S. H. K., Li, C., Li, W., … Baran, D. (2019). Efficient DPP Donor and Nonfullerene Acceptor Organic Solar Cells with High Photon-to-Current Ratio and Low Energetic Loss. Advanced Functional Materials, 1902441. doi:10.1002/adfm.201902441Sponsors
D.B. acknowledges KAUST Solar Center Fund (CARF) for financial support. W.L. thanks the financial support from NSFC (21574138 and 91633301). GIWAXS measurement and analysis, done by M.M.N. and H.A., were supported by ONR grant N000141712204 and KAUST's Center Partnership Fund (No. 3321). X-ray data were acquired at beamlines 7.3.3 at the Advanced Light Source (ALS) in Berkeley National Lab, which is supported by the U.S. Department of Energy (DE-AC02-05CH11231). Z. Peng, S. Stuard, and I. Angunawela assisted with the GIWAXS data acquisition. C. Zhu is acknowledged for the beamline supportPublisher
WileyJournal
Advanced Functional MaterialsAdditional Links
http://doi.wiley.com/10.1002/adfm.201902441ae974a485f413a2113503eed53cd6c53
10.1002/adfm.201902441