CH3NH3PbI3 planar perovskite solar cells with antireflection and self-cleaning function layers

Bhaskar Dudem, Jin Hyuck Heo, Jung Woo Leem, Jae Su Yu, Sang Hyuk Im

Research output: Contribution to journalArticle

48 Citations (Scopus)

Abstract

We report CH3NH3PbI3 planar perovskite solar cells with multifunctional inverted micro-pyramidal structured (IMPS) polydimethylsiloxane (PDMS) antireflection (AR) layers for enhancing the device efficiency. These IMPS-PDMS films were fabricated via a facile and cost-effective soft lithography using micro-pyramidal structured silicon (Si) master molds formed by alkaline anisotropic wet-etching treatment of (100)-oriented monocrystalline Si substrates. The IMPS-PDMS laminated on the bare glass (i.e., IMPS-PDMS/glass) exhibited a higher solar weighted transmittance (TSW) value of ∼95.2% (or the lowest solar weighted reflectance (RSW) of ∼4.7%) than those of the bare glass and flat-PDMS/glass, i.e., TSW/RSW ∼ 90.7/9.1 and 91.5/8.2%, respectively. Additionally, it showed a much higher average haze ratio (HA) value of ∼93.1% compared to the bare glass and flat-PDMS/glass (i.e., HA ∼ 1.6 and 2.8%, respectively). By employing the IMPS-PDMS onto the outer surface of CH3NH3PbI3 planar perovskite solar cells as an AR layer, an improved short-circuit current density (Jsc) value of 21.25 mA cm-2 was obtained, as compared to the reference device and the device with flat-PDMS (i.e., Jsc = 20.57 and 20.87 mA cm-2, respectively), while showing the almost same Voc and FF values as those of the reference device. As a result, the power conversion efficiency was improved from 17.17 and 17.42% for the reference and flat-PDMS devices, respectively, to 17.74% for the IMPS-PDMS device. Also, the fluorooctyltrichlorosilane-treated IMPS-PDMS surface revealed a superhydrophobic behavior with a water contact angle of ∼150° which is useful for self-cleaning applications in outdoor environments.

Original languageEnglish
Pages (from-to)7573-7579
Number of pages7
JournalJournal of Materials Chemistry A
Volume4
Issue number20
DOIs
Publication statusPublished - 2016 Jan 1
Externally publishedYes

ASJC Scopus subject areas

  • Chemistry(all)
  • Renewable Energy, Sustainability and the Environment
  • Materials Science(all)

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