TY - JOUR
T1 - Structure influence of alkyl chains of thienothiophene-porphyrins on the performance of organic solar cells
AU - Xie, Liuping
AU - Liu, Zhixin
AU - Tang, Wei
AU - He, Xiaote
AU - Zhai, Fengbing
AU - Yuan, Zihao
AU - Chen, Song
AU - Zhou, Xuan
AU - Yan, Lei
AU - Zhu, Xunjin
AU - Wang, Xingzhu
N1 - Funding information:
This work supported by the national key R&D program for international collaboration (No.2021YFE0191500), the National Natural Science Foundation of China (No. 51473053), the Natural Science Foundation of Hunan Province (No. 2019JJ50603) the Peacock Team Project funding from Shenzhen Science and Technology Innovation Committee (No. KQTD2015033110182370), and the Fundamental Research Project funding from Shenzhen Science and Technology Innovation Committee (No. JCYJ 20190809150213448). X. Zhu thanks the financial support from Hong Kong Research Grants Council (HKBU 12304320).
Publisher Copyright:
© 2021 Chongqing Xixin Tianyuan Data & Information Co., Ltd.
PY - 2021/11
Y1 - 2021/11
N2 - Two new A-D-A porphyrin derivatives, denoted as XLP-I and XLP-II, were prepared through extending the π-conjugation of thienothiophene-porphyrin center with phenylethynyl bridges and electron-deficient ethylrhodanine terminal units, and varying the structures of alkyl chain (linear vs branched) on peripheral thienothiophene substitutions of porphyrin rings. Both molecules show strong absorption in UV–visible–near-infrared region, good thermal stability, suitable energy levels, and ordered molecular packing in solid state. In organic solar cells, PC71BM was used as electron acceptor, and porphyrin small molecules were used as electron donors. The device based on XLP-I exhibits a power conversion efficiency (PCE) of 8.30%, an open circuit voltage (Voc) of 0.894 eV, and a fill factor (FF) of 62.1%. In contrast, the device based on XLP-II presents an inferior performance with a PCE of 3.14%, a Voc of 0.847 eV, and a FF of 49.3%. The better performance of XLP-I based device is mainly attributed to its optimized film morphology, excellent absorption, and well-balanced charge transport properties.
AB - Two new A-D-A porphyrin derivatives, denoted as XLP-I and XLP-II, were prepared through extending the π-conjugation of thienothiophene-porphyrin center with phenylethynyl bridges and electron-deficient ethylrhodanine terminal units, and varying the structures of alkyl chain (linear vs branched) on peripheral thienothiophene substitutions of porphyrin rings. Both molecules show strong absorption in UV–visible–near-infrared region, good thermal stability, suitable energy levels, and ordered molecular packing in solid state. In organic solar cells, PC71BM was used as electron acceptor, and porphyrin small molecules were used as electron donors. The device based on XLP-I exhibits a power conversion efficiency (PCE) of 8.30%, an open circuit voltage (Voc) of 0.894 eV, and a fill factor (FF) of 62.1%. In contrast, the device based on XLP-II presents an inferior performance with a PCE of 3.14%, a Voc of 0.847 eV, and a FF of 49.3%. The better performance of XLP-I based device is mainly attributed to its optimized film morphology, excellent absorption, and well-balanced charge transport properties.
KW - Branched alkyl chain
KW - Linear alkyl chain
KW - Porphyrin
KW - Small molecular donor
KW - Thienothiophene
UR - http://www.scopus.com/inward/record.url?scp=85128935691&partnerID=8YFLogxK
U2 - 10.1016/j.matre.2021.100066
DO - 10.1016/j.matre.2021.100066
M3 - Journal article
AN - SCOPUS:85128935691
SN - 2666-9358
VL - 1
JO - Materials Reports: Energy
JF - Materials Reports: Energy
IS - 4
M1 - 100066
ER -
