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Issue 5, 2015
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Perovskite photovoltachromic cells for building integration

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Photovoltachromic devices combine photovoltaic and electrochromic behaviours to enable adjustable transparency glazing, where the photovoltaic component supplies the power to drive the coloration. Such stand-alone, self-powered devices are of commercial interest for integration into windows and surfaces of buildings and vehicles. Here, we report for the first time a perovskite-based photovoltachromic device with self-adaptive transparency. This multifunctional device is capable of producing electrical power by solar energy conversion as well as undergoing a chromic transition from neutral-color semi-transparent to dark blue-tinted when irradiated with solar light, without any additional external bias. The combination of semi-transparent perovskite photovoltaic and solid-state electrochromic cells enables fully solid-state photovoltachromic devices with 26% (or 16%) average visible transmittance and 3.7% (or 5.5%) maximum light power conversion efficiency. Upon activating the self-tinting, the average visible transmittance drops to 8.4% (or 5.5%). These results represent a significant step towards the commercialization of photovoltachromic building envelopes.

Graphical abstract: Perovskite photovoltachromic cells for building integration

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The article was received on 18 Mar 2015, accepted on 20 Apr 2015 and first published on 21 Apr 2015

Article type: Paper
DOI: 10.1039/C5EE00896D
Author version available: Download Author version (PDF)
Citation: Energy Environ. Sci., 2015,8, 1578-1584
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    Perovskite photovoltachromic cells for building integration

    A. Cannavale, G. E. Eperon, P. Cossari, A. Abate, H. J. Snaith and G. Gigli, Energy Environ. Sci., 2015, 8, 1578
    DOI: 10.1039/C5EE00896D

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