TY - JOUR
T1 - Ethylene glycol-containing ammonium salt for developing highly compatible interfaces in perovskite solar cells
AU - Hyeon Lee, Ji
AU - Kim, Dongeon
AU - Opoku, Henry
AU - Ahn, Hyungju
AU - Lee, Jae Joon
AU - Baek, Se Woong
AU - Woong Jo, Jea
N1 - Publisher Copyright:
© 2022 Elsevier B.V.
PY - 2023/1/1
Y1 - 2023/1/1
N2 - For achieving efficient and stable perovskite solar cells (PSCs), the interface between the perovskite absorber and charge transport material should be modulated to provide proper energy alignment, fast charge delivery, and suppressed charge recombination. In this study, a multifunctional interface modifier for PSCs was developed by the quaternization of trimethylamine with 1-bromo-2-(2-methoxyethoxy)ethane. This ethylene glycol-containing ammonium salt (EG) effectively passivates interfacial traps and induces dipoles on the surface of the perovskite, facilitating charge transfer/extraction at the perovskite/hole transport material (HTM) interface. Accordingly, after the interface modification with EG, the PSCs showed a high efficiency of over 24% with a representative doped SpiroOMeTAD HTM. Moreover, the EG modification was revealed to be highly compatibility with dopant-free HTMs, resulting in an improved efficiency of up to 22.01% in its corresponding photovoltaics compared to those of the control and conventional alkyl-based salt treatments (19.44% and 17.94%, respectively).
AB - For achieving efficient and stable perovskite solar cells (PSCs), the interface between the perovskite absorber and charge transport material should be modulated to provide proper energy alignment, fast charge delivery, and suppressed charge recombination. In this study, a multifunctional interface modifier for PSCs was developed by the quaternization of trimethylamine with 1-bromo-2-(2-methoxyethoxy)ethane. This ethylene glycol-containing ammonium salt (EG) effectively passivates interfacial traps and induces dipoles on the surface of the perovskite, facilitating charge transfer/extraction at the perovskite/hole transport material (HTM) interface. Accordingly, after the interface modification with EG, the PSCs showed a high efficiency of over 24% with a representative doped SpiroOMeTAD HTM. Moreover, the EG modification was revealed to be highly compatibility with dopant-free HTMs, resulting in an improved efficiency of up to 22.01% in its corresponding photovoltaics compared to those of the control and conventional alkyl-based salt treatments (19.44% and 17.94%, respectively).
KW - Defect passivation
KW - Dopant-free hole transport material
KW - Energy level tuning
KW - Perovskite solar cells
KW - Spatial collection efficiency
KW - Surface modification
UR - http://www.scopus.com/inward/record.url?scp=85143837751&partnerID=8YFLogxK
U2 - 10.1016/j.cej.2022.140833
DO - 10.1016/j.cej.2022.140833
M3 - Article
AN - SCOPUS:85143837751
SN - 1385-8947
VL - 455
JO - Chemical Engineering Journal
JF - Chemical Engineering Journal
M1 - 140833
ER -