skip to main content
OSTI.GOV title logo U.S. Department of Energy
Office of Scientific and Technical Information

Title: Carrier Transport and Recombination in Efficient “All-Small-Molecule” Solar Cells with the Nonfullerene Acceptor IDTBR

Abstract

Reaching device efficiencies that can rival those of polymer-fullerene Bulk Heterojunction (BHJ) solar cells (>10%) remains challenging with the “All-Small-Molecule” (All-SM) approach, in part because of (i) the morphological limitations that prevail in the absence of polymer and (ii) the difficulty to raise and balance out carrier mobilities across the active layer. In this paper, the authors show that blends of the SM donor DR3TBDTT (DR3) and the nonfullerene SM acceptor O-IDTBR are conducive to “All-SM” BHJ solar cells with high open-circuit voltages (V OC) >1.1 V and PCEs as high as 6.4% (avg. 6.1%) when the active layers are subjected to a post-processing solvent vapor-annealing (SVA) step with dimethyl disulfide (DMDS). Combining electron energy loss spectroscopy (EELS) analyses and systematic carrier recombination examinations, the authors show that SVA treatments with DMDS play a determining role in improving charge transport and reducing non-geminate recombination for the DR3:O-IDTBR system. Finally, correlating the experimental results and device simulations, it is found that substantially higher BHJ solar cell efficiencies of >12% can be achieved if the IQE and carrier mobilities of the active layer are increased to >85% and >10 -4 cm 2 V -1 s -1, respectively, while suppressing the recombination ratemore » constant k to <10 -12 cm 3 s -1.« less

Authors:
 [1];  [1];  [2];  [1];  [1];  [3];  [1];  [1];  [1];  [1];  [4];  [1]
  1. KAUST Solar Center (KSC), Thuwal (Saudi Arabia). Physical Sciences and Engineering Division
  2. Stanford Univ., CA (United States). Electrical Engineering Dept.; SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Synchrotron Radiation Lightsource
  3. King Abdullah Univ. of Science and Technology (KAUST), Thuwal (Saudi Arabia). Imaging and Characterization Core Lab.
  4. SLAC National Accelerator Lab., Menlo Park, CA (United States). Stanford Synchrotron Radiation Lightsource
Publication Date:
Research Org.:
SLAC National Accelerator Lab., Menlo Park, CA (United States); KAUST Solar Center (KSC), Thuwal (Saudi Arabia); King Abdullah Univ. of Science and Technology (KAUST), Thuwal (Saudi Arabia)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22); King Abdullah Univ. of Science and Technology (KAUST) Office of Sponsored Research (OSR) (Saudi Arabia)
OSTI Identifier:
1462359
Alternate Identifier(s):
OSTI ID: 1431141
Grant/Contract Number:  
AC02-76SF00515; CRG_R2_13_BEAU_KAUST_1
Resource Type:
Journal Article: Accepted Manuscript
Journal Name:
Advanced Energy Materials
Additional Journal Information:
Journal Volume: 8; Journal Issue: 19; Journal ID: ISSN 1614-6832
Publisher:
Wiley
Country of Publication:
United States
Language:
English
Subject:
14 SOLAR ENERGY; carrier recombination; charge transport; nonfullerene acceptors; small molecule solar cells; solvent vapor annealing

Citation Formats

Liang, Ru-Ze, Babics, Maxime, Savikhin, Victoria, Zhang, Weimin, Le Corre, Vincent M., Lopatin, Sergei, Kan, Zhipeng, Firdaus, Yuliar, Liu, Shengjian, McCulloch, Iain, Toney, Michael F., and Beaujuge, Pierre M. Carrier Transport and Recombination in Efficient “All-Small-Molecule” Solar Cells with the Nonfullerene Acceptor IDTBR. United States: N. p., 2018. Web. doi:10.1002/aenm.201800264.
Liang, Ru-Ze, Babics, Maxime, Savikhin, Victoria, Zhang, Weimin, Le Corre, Vincent M., Lopatin, Sergei, Kan, Zhipeng, Firdaus, Yuliar, Liu, Shengjian, McCulloch, Iain, Toney, Michael F., & Beaujuge, Pierre M. Carrier Transport and Recombination in Efficient “All-Small-Molecule” Solar Cells with the Nonfullerene Acceptor IDTBR. United States. doi:10.1002/aenm.201800264.
Liang, Ru-Ze, Babics, Maxime, Savikhin, Victoria, Zhang, Weimin, Le Corre, Vincent M., Lopatin, Sergei, Kan, Zhipeng, Firdaus, Yuliar, Liu, Shengjian, McCulloch, Iain, Toney, Michael F., and Beaujuge, Pierre M. Tue . "Carrier Transport and Recombination in Efficient “All-Small-Molecule” Solar Cells with the Nonfullerene Acceptor IDTBR". United States. doi:10.1002/aenm.201800264.
@article{osti_1462359,
title = {Carrier Transport and Recombination in Efficient “All-Small-Molecule” Solar Cells with the Nonfullerene Acceptor IDTBR},
author = {Liang, Ru-Ze and Babics, Maxime and Savikhin, Victoria and Zhang, Weimin and Le Corre, Vincent M. and Lopatin, Sergei and Kan, Zhipeng and Firdaus, Yuliar and Liu, Shengjian and McCulloch, Iain and Toney, Michael F. and Beaujuge, Pierre M.},
abstractNote = {Reaching device efficiencies that can rival those of polymer-fullerene Bulk Heterojunction (BHJ) solar cells (>10%) remains challenging with the “All-Small-Molecule” (All-SM) approach, in part because of (i) the morphological limitations that prevail in the absence of polymer and (ii) the difficulty to raise and balance out carrier mobilities across the active layer. In this paper, the authors show that blends of the SM donor DR3TBDTT (DR3) and the nonfullerene SM acceptor O-IDTBR are conducive to “All-SM” BHJ solar cells with high open-circuit voltages (VOC) >1.1 V and PCEs as high as 6.4% (avg. 6.1%) when the active layers are subjected to a post-processing solvent vapor-annealing (SVA) step with dimethyl disulfide (DMDS). Combining electron energy loss spectroscopy (EELS) analyses and systematic carrier recombination examinations, the authors show that SVA treatments with DMDS play a determining role in improving charge transport and reducing non-geminate recombination for the DR3:O-IDTBR system. Finally, correlating the experimental results and device simulations, it is found that substantially higher BHJ solar cell efficiencies of >12% can be achieved if the IQE and carrier mobilities of the active layer are increased to >85% and >10-4 cm2 V-1 s-1, respectively, while suppressing the recombination rate constant k to <10-12 cm3 s-1.},
doi = {10.1002/aenm.201800264},
journal = {Advanced Energy Materials},
number = 19,
volume = 8,
place = {United States},
year = {Tue Apr 03 00:00:00 EDT 2018},
month = {Tue Apr 03 00:00:00 EDT 2018}
}

Journal Article:
Free Publicly Available Full Text
This content will become publicly available on April 3, 2019
Publisher's Version of Record

Citation Metrics:
Cited by: 1 work
Citation information provided by
Web of Science

Save / Share:

Works referenced in this record:

6.5% Efficiency of Polymer Solar Cells Based on poly(3-hexylthiophene) and Indene-C60 Bisadduct by Device Optimization
journal, June 2010

  • Zhao, Guangjin; He, Youjun; Li, Yongfang
  • Advanced Materials, Vol. 22, Issue 39, p. 4355-4358
  • DOI: 10.1002/adma.201001339