TY - JOUR
T1 - Structurally-tuned benzo[1,2-b:4,5:b']dithiophene-based polymer as a dopant-free hole transport material for perovskite solar cells
AU - Opoku, Henry
AU - Lee, Ji Hyeon
AU - Nketia-Yawson, Benjamin
AU - Ahn, Hyungju
AU - Lee, Jae Joon
AU - Jo, Jea Woong
N1 - Publisher Copyright:
© 2021 Wiley Periodicals LLC.
PY - 2022/3/15
Y1 - 2022/3/15
N2 - For highly efficient and stable perovskite solar cells (PSCs), hole transport material (HTM) should be designed and synthesized to afford suitable energy levels, high charge transport, efficient passivation ability, and high device stability. Here, we systematically modulated benzo[1,2-b:4,5:b']dithiophene-based polymer by finely controlling the thienyl and pyridyl contents within the conjugated backbone in order to develop a high performance dopant-free HTM for PSCs. We found that the optimized copolymer with 25% of pyridine content exhibits improved energy level, charge transport, and morphology compared with control homopolymers. As a result, remarkably high power conversion efficiencies up to 21.1% were achieved by employing the optimized polymer as a dopant-free HTM in PSCs.
AB - For highly efficient and stable perovskite solar cells (PSCs), hole transport material (HTM) should be designed and synthesized to afford suitable energy levels, high charge transport, efficient passivation ability, and high device stability. Here, we systematically modulated benzo[1,2-b:4,5:b']dithiophene-based polymer by finely controlling the thienyl and pyridyl contents within the conjugated backbone in order to develop a high performance dopant-free HTM for PSCs. We found that the optimized copolymer with 25% of pyridine content exhibits improved energy level, charge transport, and morphology compared with control homopolymers. As a result, remarkably high power conversion efficiencies up to 21.1% were achieved by employing the optimized polymer as a dopant-free HTM in PSCs.
KW - chemical structure tuning
KW - dopant-free hole transport materials
KW - perovskite solar cells
KW - random copolymerization
KW - semiconducting polymers
UR - http://www.scopus.com/inward/record.url?scp=85111681652&partnerID=8YFLogxK
U2 - 10.1002/pol.20210400
DO - 10.1002/pol.20210400
M3 - Article
AN - SCOPUS:85111681652
SN - 2642-4150
VL - 60
SP - 985
EP - 991
JO - Journal of Polymer Science
JF - Journal of Polymer Science
IS - 6
ER -