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.jpg): Failed to open stream: No such file or directory in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 117 Adv+Sci+(Weinh)
2017 ; 4
(11
): 1700152
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A New Electron Acceptor with meta-Alkoxyphenyl Side Chain for Fullerene-Free
Polymer Solar Cells with 9 3% Efficiency
#MMPMID29201609
Zhang Z
; Feng L
; Xu S
; Liu Y
; Peng H
; Zhang ZG
; Li Y
; Zou Y
Adv Sci (Weinh)
2017[Nov]; 4
(11
): 1700152
PMID29201609
show ga
A new small molecule acceptor, m-ITIC-OR, based on
indacenodithieno[3,2-b]thiophene core with meta-alkoxyphenyl side chains, is
designed and synthesized. The m-ITIC-OR film shows broader and redshift
absorption compared to its solution and matched energy levels with a
hexafluoroquinoxaline-based polymer donor-HFQx-T. Here, polymer solar cells
(PSCs) by blending an HFQx-T donor and an m-ITIC-OR acceptor as an active layer
deliver the power conversion efficiency (PCE) of 6.36% without any posttreatment.
The investigations demonstrate that the HFQx-T:m-ITIC-OR blend films possess
higher and more balanced charge mobility, negligible bimolecular recombination,
and nanoscale interpenetrating morphology after thermal annealing (TA) treatment.
Through a simple TA treatment at 150 °C for 5 min, an impressive PCE of 9.3% is
obtained. This efficiency is among one of the highest PCEs for additive free
PSCs. This is the first time alkoxyphenyl side chain is introduced into
nonfullerene electron acceptor; more interestingly, the new electron acceptor
(m-ITIC-OR) in this work shows a great potential for highly efficient
photovoltaic properties.