TY - JOUR
T1 - Thiophene and naphtho[1,2-c:5,6-c]bis[1,2,5]thiadiazole based alternating copolymers for polymer solar cells
AU - Li, Yuxiang
AU - Lee, Tack Ho
AU - Kim, Jihyeon
AU - Park, Song Yi
AU - Song, Seyeong
AU - Hwang, Sungu
AU - Kim, Jin Young
AU - Woo, Han Young
N1 - Funding Information:
Y. Li and T. H. Lee contributed equally to this work. This work was supported by the National Research Foundation (NRF) of Korea (NRF-2015R1D1A1A09056905, 20100020209, 2015M1A2A2057506). This work was also supported by the New & Renewable Energy Core Technology Program of the Korea Institute of Energy Technology Evaluation and Planning (KETEP), granted financial resource from the Ministry of Trade, Industry & Energy, Republic of Korea. (No. 20133030011330).
Publisher Copyright:
© 2016SPST.
PY - 2016
Y1 - 2016
N2 - Two planar type photovoltaic polymers based on naphthobisthiadiazole, poly(2,5-bis(2-hexyldecyloxy)phenylene-alt-(5,10-dithiophen-2-yl)naphtho[1,2-c:5,6-c]bis[1,2,5]thiadiazole) (h-PPDTNTz) and poly(2,5-bis(2-decyltetradecyloxy)phenylene-alt-(5,10-dithiophen-2-yl)naphtho[1,2-c:5,6-c]bis[1,2,5]thiadiazole) (d-PPDTNTz) were synthesized by incorporating intrachain noncovalent Coulombic interactions in the molecular design. To achieve a delicate balance of molecular weight, solubility as well as bulk film morphology, hexyldecyloxy (h-) and decyltetradecyloxy (d-) side-chains were substituted, which played a decisive role in modulating morphology, film packing structure and macroscopic device properties. Both polymers showed a broad light absorption up to ~800 nm and d-PPDTNTz exhibited a deeper HOMO and preferentially face-on orientation in pristine and blended films with PC71BM. The detailed optical, electrochemical, thermal, morphological and the resulting photovoltaic characteristics were studied. The best power conversion efficiency of ~6.7% was measured for d-PPDTNTz:PC71BM, suggesting that the careful choice of side-chains is necessary for fully optimize the photovoltaic materials and devices.
AB - Two planar type photovoltaic polymers based on naphthobisthiadiazole, poly(2,5-bis(2-hexyldecyloxy)phenylene-alt-(5,10-dithiophen-2-yl)naphtho[1,2-c:5,6-c]bis[1,2,5]thiadiazole) (h-PPDTNTz) and poly(2,5-bis(2-decyltetradecyloxy)phenylene-alt-(5,10-dithiophen-2-yl)naphtho[1,2-c:5,6-c]bis[1,2,5]thiadiazole) (d-PPDTNTz) were synthesized by incorporating intrachain noncovalent Coulombic interactions in the molecular design. To achieve a delicate balance of molecular weight, solubility as well as bulk film morphology, hexyldecyloxy (h-) and decyltetradecyloxy (d-) side-chains were substituted, which played a decisive role in modulating morphology, film packing structure and macroscopic device properties. Both polymers showed a broad light absorption up to ~800 nm and d-PPDTNTz exhibited a deeper HOMO and preferentially face-on orientation in pristine and blended films with PC71BM. The detailed optical, electrochemical, thermal, morphological and the resulting photovoltaic characteristics were studied. The best power conversion efficiency of ~6.7% was measured for d-PPDTNTz:PC71BM, suggesting that the careful choice of side-chains is necessary for fully optimize the photovoltaic materials and devices.
KW - Naphtho[1,2-c:5,6-c]bis[1,2,5]thiadiazole (NTz)
KW - Noncovalent coulombic interactions
KW - Photovoltaic
KW - Planarity
KW - Polymer solar cells (PSCs)
KW - Semi-crystalline
UR - http://www.scopus.com/inward/record.url?scp=84984985653&partnerID=8YFLogxK
U2 - 10.2494/photopolymer.29.553
DO - 10.2494/photopolymer.29.553
M3 - Article
AN - SCOPUS:84984985653
VL - 29
SP - 553
EP - 559
JO - Journal of Photopolymer Science and Technology
JF - Journal of Photopolymer Science and Technology
SN - 0914-9244
IS - 4
ER -
