Issue 1, 2023

Perovskite-inspired Cu2AgBiI6 for mesoscopic indoor photovoltaics under realistic low-light intensity conditions

Abstract

The considerable potential of perovskite-inspired Cu2AgBiI6 (CABI) photovoltaics under both solar and artificial lighting has been recently highlighted. However, to realistically ensure the suitability of CABI-based indoor photovoltaics (IPVs) to power the Internet of Things (IoT) ecosystem, it is necessary to study how the device performance is affected by very low-light intensity conditions (200–50 lux illumination). In this work, we find that the fine-tuning of the mesoporous TiO2 (mp-TiO2) layer thickness is crucial to maximize the performance of mesoporous CABI-based IPVs at both high and very-low artificial light intensity as it directly affects the charge extraction and non-radiative charge recombination in the devices. An optimal mp-TiO2 thickness of ∼200 nm leads to an indoor power conversion efficiency (PCE(i)) of 5.52% and a fill factor of 69%, which are the highest values for perovskite-inspired based IPVs under 1000 lux white light-emitting diode lighting. Importantly, the devices keep a high fill factor also at very low-light intensity. This guarantees a noteworthy PCE(i) value of 4.64% at 200 lux and an open-circuit voltage (VOC) of 0.38 V even at 50 lux. Our work suggests that, upon further improvements in the short-circuit current and VOC values, low-toxicity mesoscopic CABI-based IPVs may approach their theoretical PCE(i) values of 50–60% even under very low-light intensity conditions.

Graphical abstract: Perovskite-inspired Cu2AgBiI6 for mesoscopic indoor photovoltaics under realistic low-light intensity conditions

Supplementary files

Article information

Article type
Paper
Submitted
19 Jul 2022
Accepted
09 Nov 2022
First published
09 Nov 2022
This article is Open Access
Creative Commons BY license

Sustainable Energy Fuels, 2023,7, 66-73

Perovskite-inspired Cu2AgBiI6 for mesoscopic indoor photovoltaics under realistic low-light intensity conditions

G. K. Grandhi, S. Toikkonen, B. Al-Anesi, V. Pecunia and P. Vivo, Sustainable Energy Fuels, 2023, 7, 66 DOI: 10.1039/D2SE00995A

This article is licensed under a Creative Commons Attribution 3.0 Unported Licence. You can use material from this article in other publications without requesting further permissions from the RSC, provided that the correct acknowledgement is given.

Read more about how to correctly acknowledge RSC content.

Social activity

Spotlight

Advertisements