Park, Sungmin Heo, Jin Hyuck Yun, Jae Hoon Jung, Tae Sub Kwak, Kyungwon Ko, Min Jae Cheon, Cheol Hong Kim, Jin Young Im, Sang Hyuk Son, Hae Jung 2024-01-20T03:34:40Z 2024-01-20T03:34:40Z 2021-09-03 2016-08 2041-6520 https://pubs.kist.re.kr/handle/201004/123853 A series of hole-transporting materials (HTMs) based on [2,2]paracyclophane and triphenyl-amine (TPA) was synthesized. We studied the effect of the chemical structure of the HTM on the photovoltaic performance of perovskite solar cells by varying the number of TPA charge transporting components in the HTM. Tetra-TPA, in which four TPAs are incorporated into the [2,2]paracyclophane core, exhibited better hole transport properties than di-TPA and tri-TPA, which contain two and three TPAs, respectively. In particular, incorporation of the TPA group with a multi-armed structure effectively enhanced the conductivity of the HTM layer in the out-of-plane direction in the solar cell device. Due to the improved charge transport and appropriate molecular energy levels of tetra-TPA, the perovskite solar cell based on the tetra-TPA HTM achieved higher J(sc) and FF values than the devices based on di-TPA and tri-TPA HTMs, with a high solar cell efficiency (17.9%). English ROYAL SOC CHEMISTRY GLASS-TRANSITION TEMPERATURES LARGE STOKES SHIFT GEOMETRY RELAXATION EFFICIENT LENGTHS Effect of multi-armed triphenylamine-based hole transporting materials for high performance perovskite solar cells Article 10.1039/c6sc00876c 1 CHEMICAL SCIENCE, v.7, no.8, pp.5517 - 5522 CHEMICAL SCIENCE 7 8 5517 5522 scie scopus 000380893900090 2-s2.0-84979235620 Chemistry, Multidisciplinary Chemistry Article GLASS-TRANSITION TEMPERATURES LARGE STOKES SHIFT GEOMETRY RELAXATION EFFICIENT LENGTHS 정공수송체 태양전지