Journal
APPLIED PHYSICS LETTERS
Volume 105, Issue 3, Pages -Publisher
AMER INST PHYSICS
DOI: 10.1063/1.4891181
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Funding
- Department of Science and Technology (DST), India under DST INSPIRE Faculty Award [IFA-CH-27]
- DST ESCORT [RP02499]
- DST INSPIRE fellowship [IF120755]
- Ministry of New and Renewable Energy (MNRE), Government of India
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We report a simple method to mitigate ultra-violet (UV) degradation in TiO2 based perovskite solar cells (PSC) using a transparent luminescent down-shifting (DS) YVO4:Eu3+ 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 similar to 35% of its initial value. The phosphor layer also provided similar to 8.5% enhancement in photocurrent due to DS of incident UV photons into additional red photons. YVO4:Eu3+ layer thus served a bi-functional role in PSC by reducing photo-degradation as well as enhancing energy conversion efficiency. (C) 2014 AIP Publishing LLC.
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