123rd General Meeting of the KCS

Type Poster Presentation
Area Material Chemistry
Room No. Exhibition Hall 2
Time 4월 19일 (금요일) 11:00~12:30
Code MAT.P-453
Subject Improve Stability and Reduce Hysteresis of Perovskite Solar Cell with F4-TCNQ as a P-type Dopant for Polymer Hole-Transporting Material
Authors Hannah Kwon, Dong Ha Kim*
Department of Chemistry and Nano Science, Ewha Womans University, Korea
Abstract Perovskite solar cells (PSCs) have drawn significant attention and opened up a new prospect in the photovoltaic technologies to address the contemporary energy and environmental issues. Designing a hole transport material (HTM) is regarded as one of the most important approaches to improve the efficiency and stability of PSCs. Herein, an efficient model is suggested by optimizing the conjugated polymer, TFB (Poly[(9,9-dioctylfluorenyl-2,7-diyl)-co-(4,4′-(N-(4-sec-butylphenyl)diphenylamine)]), and non-hygroscopic p-type dopant F4-TCNQ (2,3,5,6-tetrafluoro-7,7,8,8-tetracyanoquinodimethane). TFB-doped F4-TCNQ can be an ideal alternative to conventional HTM to realize low price, high hole mobility and suitable energy band alignment with perovskite material. The combination of highest occupied molecular orbital (HOMO) level of TFB and lowest unoccupied molecular orbital (LUMO) level of F4-TCNQ was believed to favor an efficient charge and energy transfer between perovskite and hole transport layer (HTL), and to reduce charge recombination. Consequently, the combined utilization of the TFB and F4-TCNQ could enhance photoconductivity to improve power conversion efficiency, which resulted in the superior stability of the perovskite solar cells. This simple, novel strategy demonstrates a promising route to improve the performance of the HTL and its application to a wide range of solar cells and other photovoltaic applications.
E-mail hannah1990@hanmail.net