TY - JOUR
T1 - Extended Conjugation and End-Group Modification of Silicon-Bridged Carbazole-Based Non-Fullerene Acceptors in Indoor Organic Photovoltaics
AU - Su, Yi Jia
AU - Wu, Shang Hsuan
AU - Huang, Sheng Ci
AU - Nie, Hebing
AU - Chen, Tsung Wei
AU - Chen, Jiun Tai
AU - Hsu, Chain Shu
N1 - Publisher Copyright:
© 2022 American Chemical Society.
PY - 2022/11/28
Y1 - 2022/11/28
N2 - In this work, the strategies of extended conjugation and end-group modification are used to design four non-fullerene acceptors, DTTSiC-2F, DTTSiC-2Cl, DTTSiC-4F, and DTTSiC-4Cl. To investigate the influence of extended conjugation and end-group modification, grazing-incidence wide-angle X-ray scattering is used to analyze the packing alignment of the molecules. Photovoltaic performances under both AM 1.5G and indoor conditions are examined. Owing to the push-pull effect, DTTSiC-2F and DTTSiC-2Cl manifest a much higher lowest unoccupied molecular orbital, resulting in higher VOC. DTTSiC-4F and DTTSiC-4Cl manifest higher JSC due to the red-shifted and stronger absorption. Under indoor conditions, devices based on PM6:DTTSiC-4Cl exhibit a power conversion efficiency of 19.18% with a VOC of 0.79 V, a JSC of 92.15 μA/cm2, and an FF of 73.21%, proving that extended conjugation and end-group modification are particularly promising strategies for developing indoor organic photovoltaics.
AB - In this work, the strategies of extended conjugation and end-group modification are used to design four non-fullerene acceptors, DTTSiC-2F, DTTSiC-2Cl, DTTSiC-4F, and DTTSiC-4Cl. To investigate the influence of extended conjugation and end-group modification, grazing-incidence wide-angle X-ray scattering is used to analyze the packing alignment of the molecules. Photovoltaic performances under both AM 1.5G and indoor conditions are examined. Owing to the push-pull effect, DTTSiC-2F and DTTSiC-2Cl manifest a much higher lowest unoccupied molecular orbital, resulting in higher VOC. DTTSiC-4F and DTTSiC-4Cl manifest higher JSC due to the red-shifted and stronger absorption. Under indoor conditions, devices based on PM6:DTTSiC-4Cl exhibit a power conversion efficiency of 19.18% with a VOC of 0.79 V, a JSC of 92.15 μA/cm2, and an FF of 73.21%, proving that extended conjugation and end-group modification are particularly promising strategies for developing indoor organic photovoltaics.
KW - end-group modification
KW - extended conjugation
KW - indoor application
KW - non-fullerene acceptor
KW - organic photovoltaics
UR - http://www.scopus.com/inward/record.url?scp=85141945165&partnerID=8YFLogxK
U2 - 10.1021/acsaem.2c02472
DO - 10.1021/acsaem.2c02472
M3 - Article
AN - SCOPUS:85141945165
SN - 2574-0962
VL - 5
SP - 13851
EP - 13860
JO - ACS Applied Energy Materials
JF - ACS Applied Energy Materials
IS - 11
ER -
