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Title: Reduced ultraviolet light induced degradation and enhanced light harvesting using YVO{sub 4}:Eu{sup 3+} down-shifting nano-phosphor layer in organometal halide perovskite solar cells

We report a simple method to mitigate ultra-violet (UV) degradation in TiO{sub 2} based perovskite solar cells (PSC) using a transparent luminescent down-shifting (DS) YVO{sub 4}:Eu{sup 3+} nano-phosphor layer. The PSC coated with DS phosphor showed an improvement in stability under prolonged illumination retaining more than 50% of its initial efficiency, whereas PSC without the phosphor layer degraded to ∼35% of its initial value. The phosphor layer also provided ∼8.5% enhancement in photocurrent due to DS of incident UV photons into additional red photons. YVO{sub 4}:Eu{sup 3+} layer thus served a bi-functional role in PSC by reducing photo-degradation as well as enhancing energy conversion efficiency.
Authors:
; ; ; ; ;  [1] ;  [1] ;  [2]
  1. Photovoltaic Laboratory, Centre for Energy Studies, Indian Institute of Technology Delhi, New Delhi 110016 (India)
  2. (India)
Publication Date:
OSTI Identifier:
22311174
Resource Type:
Journal Article
Resource Relation:
Journal Name: Applied Physics Letters; Journal Volume: 105; Journal Issue: 3; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; EFFICIENCY; ENERGY CONVERSION; EUROPIUM ADDITIONS; HALIDES; ILLUMINANCE; LAYERS; LUMINESCENCE; PEROVSKITE; PHOTONS; SOLAR CELLS; STABILITY; TITANIUM OXIDES; ULTRAVIOLET RADIATION; VANADATES; VISIBLE RADIATION; YTTRIUM COMPOUNDS