Researchers from China's Soochow University recently addressed the issue of long-term stability of perovskite indoor photovoltaics (PIPVs), by using a hybrid-interlocked self-assembled monolayer (SAM) strategy to enhance device stability by improving film coverage.
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 0 (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.
The team's work could advance the commercial viability of PIPVs. By employing the reported interlocking SAM strategy, the scientists enhanced device thermal stability and achieved superior photovoltaic performance, including a record indoor efficiency. The improvements in efficiency and stability are crucial milestones towards meeting market expectations for off-grid power solutions. Furthermore, the successful integration of PIPVs with self-powered devices demonstrates their practical applicability in real-world scenarios.
The systematic research approach adopted in this work provides a robust framework for future studies, facilitating the transition of PIPVs from laboratory achievements to commercially viable products.
