Zinc Porphyrin-Ethynylaniline Conjugates as Novel Hole-Transporting Materials for Perovskite Solar Cells with Power Conversion Efficiency of 16.6%

Hsien Hsin Chou, Yu Hsien Chiang, Ming Hsien Li, Po Shen Shen, Hsiang Jung Wei, Chi Lun Mai, Peter Chen, Chen Yu Yeh

Research output: Contribution to journalArticle

56 Citations (Scopus)

Abstract

New zinc porphyrins Y2 and Y2A2 have been utilized in perovskite solar cells specifically as hole-transporting materials (HTMs) rather than photosensitizers. The combination of MAPbI3 as photosensitizer and porphyrins as HTMs is a potential alternative to well-known MAPbI3/Spiro-OMeTAD hybrids owing to high performance and versatility toward molecular engineering of porphyrin families. A high efficiency of 16.60% is achieved by n-butyl tethered Y2 HTM (VOC = 0.99 V; JSC = 22.82 mA cm-2) which is comparable to that of Spiro-OMeTAD of 18.03% (VOC = 1.06 V; JSC = 22.79 mA cm-2). Both materials possess similar highest occupied molecular orbital level and the same order of magnitude of hole mobility at 10-4 cm2 V-1 s-1. The slightly poorer performance of 10.55% (VOC = 1.01 V; JSC = 17.80 mA cm-2) is obtained for n-dodecyl tethered Y2A2 HTM. This is believed to stem from more surface pinholes when deposited on perovskite leading to an order of magnitude slower mobility.

Original languageEnglish
Pages (from-to)956-962
Number of pages7
JournalACS Energy Letters
Volume1
Issue number5
DOIs
Publication statusPublished - 2016 Nov 11

All Science Journal Classification (ASJC) codes

  • Chemistry (miscellaneous)
  • Renewable Energy, Sustainability and the Environment
  • Fuel Technology
  • Energy Engineering and Power Technology
  • Materials Chemistry

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