Advanced Functional Materials, Volume 28, Issue 32, August 8, 2018.
ZhangChao
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25 Jun 07:38
Gd43+[AlPCS4]34− Nanoagent Generating 1O2 for Photodynamic Therapy
by Marieke
Poß
,
Eva
Zittel
,
Carmen
Seidl
,
Anna
Meschkov
,
Leonel
Muñoz
,
Ute
Schepers
,
Claus
Feldmann
04 Jan 04:53
Panchromatic Ternary Photovoltaic Cells Using a Nonfullerene Acceptor Synthesized Using C–H Functionalization
by Junxiang Zhang, Cenqi Yan, Wei Wang, Yiqun Xiao, Xinhui Lu, Stephen Barlow, Timothy C. Parker, Xiaowei Zhan and Seth R. Marder
Chemistry of Materials
DOI: 10.1021/acs.chemmater.7b04499
Fiona-moon, xululu91 and 10 others like this
27 Dec 15:06
The design of highly efficient polymer solar cells with outstanding short-circuit current density based on small band gap electron acceptor
Publication date: March 2018
Source:Dyes and Pigments, Volume 150
Author(s): Danyang Ma, Shiyu Feng, Zhe Zhang, Cuihong Li, Shouke Yan, Zhishan Bo
To extend the absorption and enhance the electron mobility of fused-ring electron acceptors (FREAs), we designed and synthesized new FREAs (TTIC and TTIC-M) based on 4,9-dihydrothieno[3′,2':4,5]cyclopenta[1,2-b]thieno[2″,3'':3′,4'] cyclopenta[1′,2':4,5]thieno[2,3-d]thiophene (DTCTT) and 1,1-dicyanomethylene-3-indanone (IC). DTCTT unit possesses strong electron donating ability, which can broaden the absorption of the resulting acceptor molecule by enhanced internal charge transfer (ICT) effect. The S atoms on the fused ring structure can enhance the electron transport by intermolecular noncovalent S-S interaction. Furthermore, the introduction of a methyl group at the terminal IC unit can elevate the LUMO energy level of FREAs and afford higher open circuit voltage (V oc). As expected, TTIC and TTIC-M showed a broad absorption with the edge extending to the near-infrared (NIR) region (900 nm) and the optical band gaps of TTIC and TTIC-M is 1.40 and 1.44 eV, respectively. Devices based on PBDB-T:TTIC gave a PCE of 10.61% with an outstanding Jsc of 22.26 mA cm−2, a V oc of 0.77 V and an FF of 0.62. More noticeably, devices based on PBDB-T:TTIC-M provided a higher V oc of 0.80 V and a PCE of 11.48% with a J sc of 20.51 mA cm−2 and an FF of 0.70. 11.48% is the best performance for polymer solar cells based on small band gap nonfullerene acceptors (<1.45 eV) up to now.
Source:Dyes and Pigments, Volume 150
Author(s): Danyang Ma, Shiyu Feng, Zhe Zhang, Cuihong Li, Shouke Yan, Zhishan Bo
To extend the absorption and enhance the electron mobility of fused-ring electron acceptors (FREAs), we designed and synthesized new FREAs (TTIC and TTIC-M) based on 4,9-dihydrothieno[3′,2':4,5]cyclopenta[1,2-b]thieno[2″,3'':3′,4'] cyclopenta[1′,2':4,5]thieno[2,3-d]thiophene (DTCTT) and 1,1-dicyanomethylene-3-indanone (IC). DTCTT unit possesses strong electron donating ability, which can broaden the absorption of the resulting acceptor molecule by enhanced internal charge transfer (ICT) effect. The S atoms on the fused ring structure can enhance the electron transport by intermolecular noncovalent S-S interaction. Furthermore, the introduction of a methyl group at the terminal IC unit can elevate the LUMO energy level of FREAs and afford higher open circuit voltage (V oc). As expected, TTIC and TTIC-M showed a broad absorption with the edge extending to the near-infrared (NIR) region (900 nm) and the optical band gaps of TTIC and TTIC-M is 1.40 and 1.44 eV, respectively. Devices based on PBDB-T:TTIC gave a PCE of 10.61% with an outstanding Jsc of 22.26 mA cm−2, a V oc of 0.77 V and an FF of 0.62. More noticeably, devices based on PBDB-T:TTIC-M provided a higher V oc of 0.80 V and a PCE of 11.48% with a J sc of 20.51 mA cm−2 and an FF of 0.70. 11.48% is the best performance for polymer solar cells based on small band gap nonfullerene acceptors (<1.45 eV) up to now.
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