Performance Improvement in Low-Temperature-Processed Perovskite Solar Cells by Molecular Engineering of Porphyrin-Based Hole Transport Materials
- Authors
- Azmi, Randi; Lee, Un-Hak; Wibowo, Febrian Tri Adhi; Eom, Seung Hun; Yoon, Sung Cheol; Jang, Sung-Yeon; Jung, In Hwan
- Issue Date
- Oct-2018
- Publisher
- AMER CHEMICAL SOC
- Keywords
- porphyrins; perovskite solar cells; fluorination; hole transporting layer; low-temperature process
- Citation
- ACS APPLIED MATERIALS INTERFACES, v.10, no.41, pp.35404 - 35410
- Indexed
- SCIE
SCOPUS
- Journal Title
- ACS APPLIED MATERIALS INTERFACES
- Volume
- 10
- Number
- 41
- Start Page
- 35404
- End Page
- 35410
- URI
- https://scholarworks.bwise.kr/hanyang/handle/2021.sw.hanyang/16015
- DOI
- 10.1021/acsami.8b10170
- ISSN
- 1944-8244
- Abstract
- Porphyrin derivatives have recently emerged as hole transport layers (HTLs) because of their electron-rich characteristics. Although several successes with porphyrin-based HTLs have been recently reported, achieving excellent solar cell performance, the chances to improve this further by molecular engineering are still open. In this work, Zn porphyrin (P-zn)-based HTLs were developed by conjugating fluorinated triphenylamine (FTPA) wings at the perimeter of the P-zn core for low-temperature perovskite solar cells (L-PSCs). The fluorinated P-zn-HTLs (P-zn-2FTPA and P-zn-3FTPA) exhibited superior HTL properties compared to the nonfluorinated one (P-zn-TPA). Moreover, their deeper highest occupied molecular orbital energy levels were beneficial for boosting open-circuit voltages, and their enhanced face-on stacking improved the hole transport properties. The L-PSC using P-zn-2FTPA achieved the highest performance of 18.85%. Thus far, this result is one of the highest reported power conversion efficiencies among the PSCs using porphyrin-based HTLs.
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