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Title: Carrier Dynamics and Morphology Regulated by 1,8-Diiodooctane in Chlorinated Nonfullerene Polymer Solar Cells

Abstract

Very small amounts of 1,8-diiodooctane (DIO) are very effective at optimizing the performance of polymer solar cells (PSCs). To date, the underlying influences are not yet fully understood, especially in nonfullerene PSCs. Herein, the influence of DIO on carrier dynamics and morphology in the PBDBT2Cl:IT4F system was investigated in detail. We combined the characterization of the transient dynamics with the morphology characterization of PSC devices to explore the origin of enhanced performance. Compared to the cast device, the champion device with 0.5% DIO revealed the maximum of current density (J sc) and fill factor (FF). The optimum DIO content helps to enhance carrier transport and optimize morphology, while excess DIO produces adverse effects due to the induced intense aggregation and dilated size in blend films. The results provide some hints of improved device performance upon using DIO as an additive in nonfullerene PSCs.

Authors:
 [1];  [1];  [1]; ORCiD logo [2]; ORCiD logo [1]
  1. Southern Univ. of Science and Technology, Shenzhen (China)
  2. Argonne National Lab. (ANL), Argonne, IL (United States); Univ. of Chicago, IL (United States)
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Basic Energy Sciences (BES) (SC-22)
OSTI Identifier:
1505156
Grant/Contract Number:  
AC02-06CH11357
Resource Type:
Accepted Manuscript
Journal Name:
Journal of Physical Chemistry Letters
Additional Journal Information:
Journal Volume: 10; Journal Issue: 5; Journal ID: ISSN 1948-7185
Publisher:
American Chemical Society
Country of Publication:
United States
Language:
English
Subject:
37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY

Citation Formats

Chen, Hui, Qu, Jianfei, Liu, Longzhu, Chen, Wei, and He, Feng. Carrier Dynamics and Morphology Regulated by 1,8-Diiodooctane in Chlorinated Nonfullerene Polymer Solar Cells. United States: N. p., 2019. Web. doi:10.1021/acs.jpclett.9b00063.
Chen, Hui, Qu, Jianfei, Liu, Longzhu, Chen, Wei, & He, Feng. Carrier Dynamics and Morphology Regulated by 1,8-Diiodooctane in Chlorinated Nonfullerene Polymer Solar Cells. United States. doi:10.1021/acs.jpclett.9b00063.
Chen, Hui, Qu, Jianfei, Liu, Longzhu, Chen, Wei, and He, Feng. Wed . "Carrier Dynamics and Morphology Regulated by 1,8-Diiodooctane in Chlorinated Nonfullerene Polymer Solar Cells". United States. doi:10.1021/acs.jpclett.9b00063.
@article{osti_1505156,
title = {Carrier Dynamics and Morphology Regulated by 1,8-Diiodooctane in Chlorinated Nonfullerene Polymer Solar Cells},
author = {Chen, Hui and Qu, Jianfei and Liu, Longzhu and Chen, Wei and He, Feng},
abstractNote = {Very small amounts of 1,8-diiodooctane (DIO) are very effective at optimizing the performance of polymer solar cells (PSCs). To date, the underlying influences are not yet fully understood, especially in nonfullerene PSCs. Herein, the influence of DIO on carrier dynamics and morphology in the PBDBT2Cl:IT4F system was investigated in detail. We combined the characterization of the transient dynamics with the morphology characterization of PSC devices to explore the origin of enhanced performance. Compared to the cast device, the champion device with 0.5% DIO revealed the maximum of current density (Jsc) and fill factor (FF). The optimum DIO content helps to enhance carrier transport and optimize morphology, while excess DIO produces adverse effects due to the induced intense aggregation and dilated size in blend films. The results provide some hints of improved device performance upon using DIO as an additive in nonfullerene PSCs.},
doi = {10.1021/acs.jpclett.9b00063},
journal = {Journal of Physical Chemistry Letters},
number = 5,
volume = 10,
place = {United States},
year = {2019},
month = {2}
}

Journal Article:
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This content will become publicly available on February 13, 2020
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