Acridine-based novel hole transporting material for high efficiency perovskite solar cells

An-Na Cho, Nallan Chakravarthi, Kakaraparthi Kranthiraja, Saripally Sudhaker Reddy, Hui-Seon Kim, Sung-Ho Jin, Nam-Gyu Park

Research output: Contribution to journalArticleResearchpeer-review

42 Citations (Scopus)

Abstract

An acridine-based hole transporting material (ACR-TPA) without the spirobifluorene motif is synthesized via non complicated steps. The ACR-TPA film including Li-TFSI and 4-tert-butylpyridine (tBP) additives exhibits a hole mobility of 3.08 × 10−3 cm2 V−1 s−1, which is comparable to the mobility of the classical spiro-MeOTAD (2.63 × 10−3 cm2 V−1 s−1), and its HOMO level of −5.03 eV is slightly lower than that of spiro-MeOTAD (−4.97 eV). ACR-TPA layers with different thicknesses are applied to MAPbI3 perovskite solar cells, where power conversion efficiency (PCE) increases as the ACR-TPA layer thickness increases due to increased recombination resistance and fast charge separation. The best PCE of 16.42% is achieved from the ca. 250 nm-thick ACR-TPA, which is comparable to the PCE of 16.26% for a device with spiro-MeOTAD in the same device configuration. It is thus anticipated that ACR-TPA can be a promising alternative to spiro-MeOTAD because of its lower cost and comparable photovoltaic performance.

Original languageEnglish
Pages (from-to)7603-7611
Number of pages9
JournalJournal of Materials Chemistry A
Volume5
Issue number16
DOIs
Publication statusPublished - 2017
Externally publishedYes

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