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Title: High-performance ternary blend polymer solar cells involving both energy transfer and hole relay processes

Abstract

The integration of multiple materials with complementary absorptions into a singlejunction device is regarded as an efficient way to enhance the power conversion efficiency (PCE) of organic solar cells (OSCs). However, due to increased complexity with one more component, only limited high performance ternary systems have been demonstrated previously. Here, we report an efficient ternary blend OSC with a PCE of 9.2%. We show for the first time that the third component can reduce surface trap densities in the ternary blend. Detailed studies unravel that the improved performance results from synergistic effects of enlarged open circuit voltage, suppressed trap assisted recombination, enhanced light absorption, increased hole extraction, efficient energy transfer, and better morphology. The novel working mechanism and high device performance demonstrate new insights and design guidelines for high performance ternary blend solar cells and suggest that ternary structure is a promising platform to boost the efficiency of OSCs.

Authors:
; ; ;
Publication Date:
Research Org.:
Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science - Office of Basic Energy Sciences - Materials Sciences and Engineering Division; National Science Foundation (NSF); Air Force Research Laboratory (AFRL) - Air Force Office of Scientific Research (AFOSR)
OSTI Identifier:
1392064
DOE Contract Number:  
AC02-06CH11357
Resource Type:
Journal Article
Journal Name:
Nature Communications
Additional Journal Information:
Journal Volume: 6; Journal ID: ISSN 2041-1723
Publisher:
Nature Publishing Group
Country of Publication:
United States
Language:
English
Subject:
PTB7-Th; high efficiency; photovoltaic; polymer solar cells; ternary

Citation Formats

Lu, Luyao, Chen, Wei, Xu, Tao, and Yu, Luping. High-performance ternary blend polymer solar cells involving both energy transfer and hole relay processes. United States: N. p., 2015. Web. doi:10.1038/ncomms8327.
Lu, Luyao, Chen, Wei, Xu, Tao, & Yu, Luping. High-performance ternary blend polymer solar cells involving both energy transfer and hole relay processes. United States. doi:10.1038/ncomms8327.
Lu, Luyao, Chen, Wei, Xu, Tao, and Yu, Luping. Thu . "High-performance ternary blend polymer solar cells involving both energy transfer and hole relay processes". United States. doi:10.1038/ncomms8327.
@article{osti_1392064,
title = {High-performance ternary blend polymer solar cells involving both energy transfer and hole relay processes},
author = {Lu, Luyao and Chen, Wei and Xu, Tao and Yu, Luping},
abstractNote = {The integration of multiple materials with complementary absorptions into a singlejunction device is regarded as an efficient way to enhance the power conversion efficiency (PCE) of organic solar cells (OSCs). However, due to increased complexity with one more component, only limited high performance ternary systems have been demonstrated previously. Here, we report an efficient ternary blend OSC with a PCE of 9.2%. We show for the first time that the third component can reduce surface trap densities in the ternary blend. Detailed studies unravel that the improved performance results from synergistic effects of enlarged open circuit voltage, suppressed trap assisted recombination, enhanced light absorption, increased hole extraction, efficient energy transfer, and better morphology. The novel working mechanism and high device performance demonstrate new insights and design guidelines for high performance ternary blend solar cells and suggest that ternary structure is a promising platform to boost the efficiency of OSCs.},
doi = {10.1038/ncomms8327},
journal = {Nature Communications},
issn = {2041-1723},
number = ,
volume = 6,
place = {United States},
year = {2015},
month = {6}
}

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