TY - JOUR
T1 - Fast-Growth Polymer
T2 - Fullerene Bulk-Heterojunction Thin Films for Efficient Organic Photovoltaics
AU - Chung, Daewon
AU - Balamurugan, Chandran
AU - Park, Byoungwook
AU - Lee, Hyeonryul
AU - Cho, Ilhyeon
AU - Yoon, Chaerin
AU - Park, Soyeon
AU - Jo, Yong Ryun
AU - Jeon, Joonhyeon
AU - Hong, Soonil
AU - Kwon, Sooncheol
N1 - Publisher Copyright:
© 2024 by the authors.
PY - 2024/3
Y1 - 2024/3
N2 - The bulk-heterojunction (BHJ) system that uses a (Formula presented.) -conjugated polymer as an electron donor, and a fullerene derivative as an electron acceptor, is widely used in organic solar cells (OSCs) to facilitate efficient charge separation and extraction. However, the conventional BHJ system still suffers from unwanted phase segregation caused by the existence of significant differences in surface energy between the two BHJ components and the charge extraction layer during film formation. In the present work, we demonstrate a sophisticated control of fast film-growth kinetics that can be used to achieve a uniform distribution of donor and acceptor materials in the BHJ layer of OSCs without undesirable phase separation. Our approach involves depositing the BHJ solution onto a spinning substrate, thus inducing rapid evaporation of the solvent during BHJ film formation. The fast-growth process prevents the fullerene derivative from migrating toward the charge extraction layer, thereby enabling a homogeneous distribution of the fullerene derivative within the BHJ film. The OSCs based on the fast-growth BHJ thin film are found to exhibit substantial increases in JSC, fill factor, and a PCE up to 11.27 mA/cm2, 66%, and 4.68%, respectively; this last value represents a remarkable 17% increase in PCE compared to that of conventional OSCs.
AB - The bulk-heterojunction (BHJ) system that uses a (Formula presented.) -conjugated polymer as an electron donor, and a fullerene derivative as an electron acceptor, is widely used in organic solar cells (OSCs) to facilitate efficient charge separation and extraction. However, the conventional BHJ system still suffers from unwanted phase segregation caused by the existence of significant differences in surface energy between the two BHJ components and the charge extraction layer during film formation. In the present work, we demonstrate a sophisticated control of fast film-growth kinetics that can be used to achieve a uniform distribution of donor and acceptor materials in the BHJ layer of OSCs without undesirable phase separation. Our approach involves depositing the BHJ solution onto a spinning substrate, thus inducing rapid evaporation of the solvent during BHJ film formation. The fast-growth process prevents the fullerene derivative from migrating toward the charge extraction layer, thereby enabling a homogeneous distribution of the fullerene derivative within the BHJ film. The OSCs based on the fast-growth BHJ thin film are found to exhibit substantial increases in JSC, fill factor, and a PCE up to 11.27 mA/cm2, 66%, and 4.68%, respectively; this last value represents a remarkable 17% increase in PCE compared to that of conventional OSCs.
KW - P3HT (Poly-3-hexylthiophene)
KW - PCBM ([6,6]-phenyl-C61-butyric acid methyl ester)
KW - bulk heterojunction
KW - homogeneous morphology
KW - organic solar cells
UR - http://www.scopus.com/inward/record.url?scp=85188887124&partnerID=8YFLogxK
U2 - 10.3390/nano14060502
DO - 10.3390/nano14060502
M3 - Article
AN - SCOPUS:85188887124
SN - 2079-4991
VL - 14
JO - Nanomaterials
JF - Nanomaterials
IS - 6
M1 - 502
ER -