The rise of the Internet of Things (IoT) has spurred rapid growth in demand for self-powered devices, driving the advancement of highly compatible indoor photovoltaics (IPV). Perovskite indoor photovoltaics (PIPV) have attracted significant attention due to their tunable bandgap and high open-circuit voltage. However, long-term stability remains the most critical barrier to the commercialization of PIPV and is currently under intense market scrutiny.
Addressing this challenge, researchers employed a hybrid-interlocked self-assembled monolayer (SAM) strategy to enhance device stability. This approach capitalizes on the crucial role of SAM stability in determining the overall stability of inverted PIPV devices. By combining SAM materials with different carbon chain lengths, they effectively increased the SAM surface coverage on indium tin oxide (ITO) substrates and strengthened the binding energy between the SAM and ITO.
The optimized devices achieved a record indoor power conversion efficiency (PCE) of 42.01% under 1000 lux illumination. Furthermore, during accelerated aging stability tests simulating diurnal-periodic light-intensity fluctuations from 2000 lux to dark, the target devices exhibited a projected T90 lifetime approaching 6000 hours. Ultimately, the PIPV module was successfully demonstrated to continuously and reliably power an electronic price tag via an integrated circuit.
This work, published in the National Science Review (NSR), features Soochow University postdoctoral researcher CHEN Chun-Hao, master's students HE Xiao-Ying and QIN Rui-Hao as co-first authors, with Professor WANG Zhao-Kui as the sole corresponding author.
