Efficient all polymer solar cells employing donor polymer based on benzo[1,2-b:4,5-b’]dithiophene unit
Guanqun Ding,
Jianyu Yuan,
Xiaodong Huang,
Zeke Liu,
Guozheng Shi,
Shaohua Shi,
Jiexiong Ding,
Hai-Qiao Wang,
Wanli Ma
Affiliations
Guanqun Ding
Jiangsu Key Laboratory for Carbon-based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu 215123, China
Jianyu Yuan
Jiangsu Key Laboratory for Carbon-based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu 215123, China
Xiaodong Huang
Jiangsu Key Laboratory for Carbon-based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu 215123, China
Zeke Liu
Jiangsu Key Laboratory for Carbon-based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu 215123, China
Guozheng Shi
Jiangsu Key Laboratory for Carbon-based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu 215123, China
Shaohua Shi
Jiangsu Key Laboratory for Carbon-based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu 215123, China
Jiexiong Ding
Jiangsu Key Laboratory for Carbon-based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu 215123, China
Hai-Qiao Wang
Institute of New Energy Technology, Ningbo Institute of Materials Technology and Engineering (NIMTE), Chinese Academy of Science (CAS), Ningbo, Zhejiang 315201, China
Wanli Ma
Jiangsu Key Laboratory for Carbon-based Functional Materials & Devices, Institute of Functional Nano & Soft Materials (FUNSOM), Soochow University, Suzhou, Jiangsu 215123, China
We reported all polymer solar cells (all-PSCs) employing BDT-based donor–acceptor (D–A) polymers composed of benzo[1,2-b:4,5-b’]dithiophene (BDT) and thiadiazolo[3,4-c]pyridine (PyTZ) (PBPT-8 and PBPT-12) as donor and NDI-based n-type polymer Poly{[N,N’-bis(2-octyldodecyl)-naphthalene-1,4,5,8-bis(dicarboximide)-2,6-diyl]-alt-5,5’-(2,2’-bithiophene)} (P(NDI2OD-T2)) (N2200) as acceptor. The influence of thermal annealing on the performance of all-PSCs was systematically investigated and discussed. It was found that the pre-annealing of the active blend films could significantly improve the all-PSCs performance. Both PBPT-8/PBPT-12:N2200 systems can deliver promising PCEs (4.12% and 4.25%) at the optimal annealing temperature of 160 oC due to the promoted film quality and charge transport properties. Morphology investigation and carrier mobility measurements have been carried out to analyze the effect of thermal annealing. This study suggests that BDT-based polymer:N2200 systems can be promising candidates for all-PSCs, with thermal annealing as an effective approach to promote the device performance.
