Effect of multi-armed triphenylamine-based hole transporting materials for high performance perovskite solar cells

Sungmin Park, Jin Hyuck Heo, Jae Hoon Yun, Tae Sub Jung, Kyungwon Kwak, Min Jae Ko, Cheol Hong Cheon, Jin Young Kim, Sang Hyuk Im, Hae Jung Son

Research output: Contribution to journalArticlepeer-review

59 Citations (Scopus)

Abstract

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 Jsc and FF values than the devices based on di-TPA and tri-TPA HTMs, with a high solar cell efficiency (17.9%).

Original languageEnglish
Pages (from-to)5517-5522
Number of pages6
JournalChemical Science
Volume7
Issue number8
DOIs
Publication statusPublished - 2016

ASJC Scopus subject areas

  • Chemistry(all)

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