123rd General Meeting of the KCS

Type Poster Presentation
Area Polymer Chemistry
Room No. Exhibition Hall 2
Time 4월 19일 (금요일) 11:00~12:30
Code POLY.P-48
Subject Concentration dependent excitation decays of polymer films blended with non-fullerene acceptors
Authors Jeong Yoon Choi, Sang Woong Kang, Chan Im*
Department of Chemistry, Konkuk University, Korea
Abstract Bulk-heterojunction (BHJ) type organic solar cells have made a significant improvement by using non-fullerene acceptors to establish high power conversion efficiency. This indicates that the efficiency limits of BHJ type organic solar cells based on the electron donating polymer derivatives commonly known as P3HT or PTB7 blended with fullerene derivatives also known as PC61BM or PC71BM could be extended by substitution of the fullerene acceptors with novel non-fullerene type acceptors. To achieve further PCE improvement of BHJ type organic solar cells, exact understanding about exciton dissociation and recombination behaviors within BHJ thin films having various acceptor concentrations are essential. Therefore, we have performed acceptor concentration dependent transient absorption spectroscopy by using BHJ thin films consisted of typical polymer donors and non-fullerene acceptors. Those spectroscopic results are discussed in conjunction with the corresponding device performances to depict detailed behaviors of excitons as well as charge carriers within non-fullerene based active layers. This work was supported by the National Research Foundation of Korea (Project No.: NRF-2018R1D1A1B07048843 & NRF-2018K2A9A2A06023902).
E-mail wjdauddhqk@naver.com