Optimized organometal halide perovskite planar hybrid solar cells via control of solvent evaporation rate

Rira Kang, Jeung Eun Kim, Jun Seok Yeo, Sehyun Lee, Ye Jin Jeon, Dong Yu Kim

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59 Citations (Scopus)

Abstract

Organometallic halide perovskite-based solar cells have exhibited rapidly increasing effi ciencies through the use of mesoporous composites. The addition of materials used in organic solar cells to perovskite-based solar cells (PSCs) enables the fabrication of low-cost, flexible, low-temperature, solution-processed PSCs. However, obtaining sufficient coverage of the organic layer, usually poly(3,4-ethylenedioxythiophene) - poly(styrenesulfonate) (PEDOT:PSS), with CH3NH3PbI3-xClx films remains difficult in spite of the advances. In this study, we investigated the influence of controlling the solvent evaporation rate on the degree of PEDOT:PSS surface coverage by CH3NH3PbI3-xClx. We determined that an adequately fast spinning speed, drying at room temperature, and stepwise ramp annealing are critical for obtaining optimized planar hybrid perovskite solar cells with an ITO/PEDOT:PSS/CH3NH3PbI3-xClx/PCBM/Al structure and efficiencies of up to 11.8%.

Original languageEnglish
Pages (from-to)26513-26520
Number of pages8
JournalJournal of Physical Chemistry C
Volume118
Issue number46
DOIs
Publication statusPublished - 20 Nov 2014
Externally publishedYes

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