We use cookies to improve your experience and for marketing. Read our cookie policy or manage cookies.
Search across reports, market insights, and blog stories.
A recent study published in Materials Advances describes how an international research team enhanced perovskite indoor photovoltaics by adjusting the absorber bandgap to align with the emission spectrum of indoor LED lighting. According to the source, this tuning facilitates improved spectral matching under low-light conditions, with devices reaching efficiencies of up to 37.44% and maintaining stability for over 2,000 hours.
The researchers fabricated three devices using a conventional mesoscopic n-i-p architecture. The structure included a fluorine-doped tin oxide substrate, layers of compact and mesoporous titanium oxide for electron transport, a perovskite absorber on the mesoporous scaffold, a Spiro-OMeTAD hole transport layer, and a gold back contact. Only the perovskite absorber composition was varied by changing the iodide-to-bromide ratio to control the bandgap. The first device, with 2% bromide, had a bandgap of 1.55 eV; the second, with 45% bromide, achieved a 1.72 eV bandgap; and the third, with 85% bromide, produced a 1.88 eV bandgap.
Each device was tested under multiple light intensities—1,000, 500, and 250 lux—and LED color temperatures of 3,000 K, 4,000 K, and 5,500 K. Performance metrics included power conversion efficiency, open-circuit voltage, short-circuit current density, and fill factor, measured across all nine conditions. Additional characterization involved photoluminescence spectroscopy, X-ray diffraction, scanning electron microscopy, atomic force microscopy, and long-term stability testing under indoor illumination for up to 2,000 hours.
The study revealed that the 1.72 eV composition performed consistently well across varied light intensities and color temperatures. The corresponding author noted that its reduced sensitivity to spectral changes challenges the conventional belief that wider bandgaps lead to narrow operating windows. The 1.88 eV device achieved a peak efficiency of 37.44% under low-intensity (250 lux, 5,500 K) illumination, showing that near-perfect spectral alignment can offset material limitations in specific indoor conditions.
The research concluded that there is no single optimal bandgap for indoor photovoltaics, as device performance depends heavily on illumination conditions. The next phase of the study will focus on addressing trap-assisted recombination in high-bandgap perovskites through defect passivation and interface engineering, with the goal of integrating these devices into functional Internet of Things systems for real-world validation. Scientists from King Abdulaziz City for Science and Technology, King Saud University, Taibah University, the Foundation for Research and Technology – Hellas, Hellenic Mediterranean University, and the University of Crete participated in the study.
Making Data-Driven Decisions to Grow Your Business
A Quick Overview of Market Performance
Understanding the Current State of The Market and its Prospects
Finding New Products to Diversify Your Business
Choosing the Best Countries to Establish Your Sustainable Supply Chain
Choosing the Best Countries to Boost Your Export
The Latest Trends and Insights into The Industry
The Largest Import Supplying Countries
The Largest Destinations for Exports
The Largest Producers on The Market and Their Profiles
The Largest Markets And Their Profiles
Instant access. No credit card needed.
Online access to 2M+ reports, dashboards, and tables. Trusted by Fortune 500 teams.
IndexBox, Inc.
2093 Philadelphia Pike #1441
Claymont, DE 19703, USA
Contact us
© 2026 IndexBox, Inc

source