TY - JOUR
T1 - Alkyl-thiophene-alkyl linkers to construct double-cable conjugated polymers for single-component organic solar cells
AU - Lai, Wenbin
AU - Karuthedath, Safakath
AU - Xiao, Chengyi
AU - Meng, Lei
AU - Laquai, Frédéric
AU - Li, Weiwei
AU - Li, Yongfang
N1 - Publisher Copyright:
© 2023
PY - 2024/1
Y1 - 2024/1
N2 - In this work, semirigid linkers of the alkyl-thiophene-alkyl structure are developed to construct double-cable polymers. Three alkyl units, propyl (C3H6), hexyl (C6H12), and dodecyl (C12H24), are applied as semirigid linkers, yielding three double-cable polymers: PBC6-T, PBC12-T, and PBC24-T, respectively. PBC12-T which uses C6H12-thiophene-C6H12 linkers is found to exhibit the best device efficiency of 5.56%, while PBC6-T and PBC24-T with shorter or longer linkers yield device efficiencies of only 2.65% and 1.09% in single-component organic solar cells (SCOSCs). Further studies reveal that PBC12-T exhibits higher crystallinity and improved charge transport, resulting in better efficiencies. Our work provides an approach to construct double-cable conjugated polymers with long alkyl linkers, and it shows the importance of the linker length for the photovoltaic performance of SCOSCs.
AB - In this work, semirigid linkers of the alkyl-thiophene-alkyl structure are developed to construct double-cable polymers. Three alkyl units, propyl (C3H6), hexyl (C6H12), and dodecyl (C12H24), are applied as semirigid linkers, yielding three double-cable polymers: PBC6-T, PBC12-T, and PBC24-T, respectively. PBC12-T which uses C6H12-thiophene-C6H12 linkers is found to exhibit the best device efficiency of 5.56%, while PBC6-T and PBC24-T with shorter or longer linkers yield device efficiencies of only 2.65% and 1.09% in single-component organic solar cells (SCOSCs). Further studies reveal that PBC12-T exhibits higher crystallinity and improved charge transport, resulting in better efficiencies. Our work provides an approach to construct double-cable conjugated polymers with long alkyl linkers, and it shows the importance of the linker length for the photovoltaic performance of SCOSCs.
KW - Alkyl-thiophene-alkyl
KW - Double-cable conjugated polymer
KW - Semirigid linkers
KW - Single-component organic solar cellCrystallinity
UR - http://www.scopus.com/inward/record.url?scp=85175429755&partnerID=8YFLogxK
U2 - 10.1016/j.cclet.2023.108287
DO - 10.1016/j.cclet.2023.108287
M3 - Article
AN - SCOPUS:85175429755
SN - 1001-8417
VL - 35
JO - Chinese Chemical Letters
JF - Chinese Chemical Letters
IS - 1
M1 - 108287
ER -
