Low-temperature solution-processed SnO2 nanoparticles as a cathode buffer layer for inverted organic solar cells

Van Huong Tran, Rohan B. Ambade, Swapnil B. Ambade, Soo Hyoung Lee, In-Hwan Lee

Research output: Contribution to journalArticle

43 Citations (Scopus)

Abstract

SnO2 recently has attracted particular attention as a powerful buffer layer for organic optoelectronic devices due to its outstanding properties such as high electron mobility, suitable band alignment, and high optical transparency. Here, we report on facile low-temperature solution-processed SnO2 nanoparticles (NPs) in applications for a cathode buffer layer (CBL) of inverted organic solar cells (iOSCs). The conduction band energy of SnO2 NPs estimated by ultraviolet photoelectron spectroscopy was 4.01 eV, a salient feature that is necessary for an appropriate CBL. Using SnO2 NPs as CBL derived from a 0.1 M precursor concentration, P3HT:PC60BM-based iOSCs showed the best power conversion efficiency (PCE) of 2.9%. The iOSC devices using SnO2 NPs as CBL revealed excellent long-term device stabilities, and the PCE was retained at ∼95% of its initial value after 10 weeks in ambient air. These solution-processed SnO2 NPs are considered to be suitable for the low-cost, high throughput roll-to-roll process on a flexible substrate for optoelectronic devices.

Original languageEnglish
Pages (from-to)1645-1653
Number of pages9
JournalACS Applied Materials and Interfaces
Volume9
Issue number2
DOIs
Publication statusPublished - 2017 Jan 1
Externally publishedYes

Fingerprint

Buffer layers
Cathodes
Nanoparticles
Optoelectronic devices
Conversion efficiency
Temperature
Ultraviolet photoelectron spectroscopy
Electron mobility
Conduction bands
Transparency
Throughput
Organic solar cells
Substrates
Air
Costs

Keywords

  • Cathode buffer layer
  • Inverted organic solar cells
  • Low-temperature synthesis
  • Nanoparticle morphology
  • SnO2 nanoparticles
  • Solution-processed metal oxide

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Low-temperature solution-processed SnO2 nanoparticles as a cathode buffer layer for inverted organic solar cells. / Tran, Van Huong; Ambade, Rohan B.; Ambade, Swapnil B.; Lee, Soo Hyoung; Lee, In-Hwan.

In: ACS Applied Materials and Interfaces, Vol. 9, No. 2, 01.01.2017, p. 1645-1653.

Research output: Contribution to journalArticle

Tran, Van Huong ; Ambade, Rohan B. ; Ambade, Swapnil B. ; Lee, Soo Hyoung ; Lee, In-Hwan. / Low-temperature solution-processed SnO2 nanoparticles as a cathode buffer layer for inverted organic solar cells. In: ACS Applied Materials and Interfaces. 2017 ; Vol. 9, No. 2. pp. 1645-1653.
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