TY - JOUR
T1 - Tuning electronic properties of molecular acceptor-π-porphyrin-π-acceptor donors via π-linkage structural engineering
AU - Chen, Song
AU - Tang, Wei
AU - Yin, Hang
AU - Wang, Zaiyu
AU - Zheng, Kailin
AU - Xie, Liuping
AU - Wang, Xingzhu
AU - So, Shu Kong
AU - Liu, Feng
AU - Zhu, Xunjin
N1 - Funding Information:
This work was supported Hong Kong Research Grants Council ( HKBU 22304115-ECS ), Areas of Excellence Scheme ([ AoE/P-03/08 ]), and the Science, Technology and Innovation Committee of Shenzhen Municipality ( JCYJ20150630164505504 ). X. Wang thanks the project of Innovation Platform Open Foundation of University of Hunan Province ( 14K092 ), the National Natural Science Foundation of China ( 51473139 , 91333206 ), Hunan 2011 Collaborative Innovation Center of Chemical Engineering & Technology with Environmental Benignity and Effective Resource Utilization, and the Natural Science Foundation of Hunan Province ( 2019JJ50603 ), and the Graduate student scientific research innovation projects in Hunan province ( CX2018B368 and CX2017B303 ) for the support.
Funding Information:
This work was supported Hong Kong Research Grants Council (HKBU 22304115-ECS), Areas of Excellence Scheme ([AoE/P-03/08]), and the Science, Technology and Innovation Committee of Shenzhen Municipality (JCYJ20150630164505504). X. Wang thanks the project of Innovation Platform Open Foundation of University of Hunan Province (14K092), the National Natural Science Foundation of China (51473139, 91333206), Hunan 2011 Collaborative Innovation Center of Chemical Engineering & Technology with Environmental Benignity and Effective Resource Utilization, and the Natural Science Foundation of Hunan Province (2019JJ50603), and the Graduate student scientific research innovation projects in Hunan province (CX2018B368 and CX2017B303) for the support.
PY - 2019/10
Y1 - 2019/10
N2 - Three new molecular A-π-D-π-A type donors, P1, P2 and P3, comprising an alkylthiothienyl substituted porphyrin electron donor core (D) and two 3-ethylrhodanine electron acceptor moieties (A) connected peripherally to the porphyrin core via respectively a monomeric, dimeric or trimeric phenylethynyl π-linkage, are synthesized and studied for their optoelectronic, charge transport, and photovoltaic properties. The hole mobilities of their blend films with PC71BM follow the order of P3> P2 > P1 in hole-only device. When used as electron donors with fullerene acceptor, PC71BM, in conventional bulk heterojunction organic solar cells, the optimal device with P1 donors shows a lower FF, but an intensity stronger and broader EQE, the highest JSC and VOC. As a whole, the PCEs of their optimal devices follow the order of P1> P2 > P3, corresponding to 8.61%, 8.20% and 7.82%, respectively. These results clearly demonstrate the decisive influence of π–linkage length over photovoltaic performance, and that the shorter the π–linkage length the better the photovoltaic performance.
AB - Three new molecular A-π-D-π-A type donors, P1, P2 and P3, comprising an alkylthiothienyl substituted porphyrin electron donor core (D) and two 3-ethylrhodanine electron acceptor moieties (A) connected peripherally to the porphyrin core via respectively a monomeric, dimeric or trimeric phenylethynyl π-linkage, are synthesized and studied for their optoelectronic, charge transport, and photovoltaic properties. The hole mobilities of their blend films with PC71BM follow the order of P3> P2 > P1 in hole-only device. When used as electron donors with fullerene acceptor, PC71BM, in conventional bulk heterojunction organic solar cells, the optimal device with P1 donors shows a lower FF, but an intensity stronger and broader EQE, the highest JSC and VOC. As a whole, the PCEs of their optimal devices follow the order of P1> P2 > P3, corresponding to 8.61%, 8.20% and 7.82%, respectively. These results clearly demonstrate the decisive influence of π–linkage length over photovoltaic performance, and that the shorter the π–linkage length the better the photovoltaic performance.
KW - Charge mobility
KW - Electron donor materials
KW - Organic solar cells
KW - Phenylene ethynylene
KW - Porphyrin
UR - http://www.scopus.com/inward/record.url?scp=85067819206&partnerID=8YFLogxK
U2 - 10.1016/j.orgel.2019.06.005
DO - 10.1016/j.orgel.2019.06.005
M3 - Journal article
AN - SCOPUS:85067819206
SN - 1566-1199
VL - 73
SP - 146
EP - 151
JO - Organic Electronics
JF - Organic Electronics
ER -
