Investigation of Hole-Transporting Poly(triarylamine) on Aggregation and Charge Transport for Hysteresisless Scalable Planar Perovskite Solar Cells

Yohan Ko, Yechan Kim, Chanyong Lee, Youbin Kim, Yongseok Jun

Research output: Contribution to journalArticle

12 Citations (Scopus)

Abstract

Organometallic halide perovskite solar cells (PSCs) have unique photovoltaic properties for use in next-generation solar energy harvesting systems. The highest efficiency of PSCs reached 22.1% on a laboratory scale of <0.1 cm2 device area. Thus, scaling up is the next step toward commercialization, but the difficulty in controlling the quality of large-area perovskite thin films remains a fundamental challenge. It has also been frequently reported that the J-V hysteresis is intensified in PSCs with areas larger than 1 cm2. In this study, we have fabricated a large-area perovskite layer using PbICl films, providing an intrinsic porous layer and enhancing the uniformity of the perovskite layer at areas larger than 1 cm2. Furthermore, we have investigated the polymeric properties of the prevalent hole-transporting material poly(triarylamine) (PTAA) with its photovoltaic performance. Two types of PTAAs, poly[bis(4-phenyl)(2,4-dimethylphenyl)amine] and poly[bis(4-phenyl)(2,4,6-trimethylphenyl)amine], were compared. A series of PTAAs with different molecular weights (Mw) and polydispersity indices were studied, as the molecular weight of the PTAA is a key factor in determining the electrical properties and photovoltaic performance of the system. The fabricated PSCs with an aperture area of 1 cm2 based on a high-molecular-weight PTAA achieved a power conversion efficiency of 16.47% with negligible hysteresis and excellent reproducibility.

Original languageEnglish
Pages (from-to)11633-11641
Number of pages9
JournalACS Applied Materials and Interfaces
Volume10
Issue number14
DOIs
Publication statusPublished - 2018 Apr 11
Externally publishedYes

Fingerprint

Charge transfer
Agglomeration
Perovskite
Molecular weight
Amines
Hysteresis
Energy harvesting
Polydispersity
Organometallics
Solar energy
Conversion efficiency
Electric properties
Thin films
Perovskite solar cells
perovskite

Keywords

  • distribution of conducting polymer
  • large area
  • molecular weight
  • PbICl
  • perovskite solar cells
  • PTAA

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Investigation of Hole-Transporting Poly(triarylamine) on Aggregation and Charge Transport for Hysteresisless Scalable Planar Perovskite Solar Cells. / Ko, Yohan; Kim, Yechan; Lee, Chanyong; Kim, Youbin; Jun, Yongseok.

In: ACS Applied Materials and Interfaces, Vol. 10, No. 14, 11.04.2018, p. 11633-11641.

Research output: Contribution to journalArticle

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