Indoor solar cells built from perovskite boast an efficiency of 42%, with a lifespan of 6,000 hours.
Scientists at Soochow University in China have made a significant breakthrough in the field of indoor energy generation with the development of novel perovskite indoor photovoltaics (PIPVs). These new PIPVs have set a record indoor power conversion efficiency of 42.01%, surpassing previous achievements in the field [1][3].
The team's success is attributed to the use of a hybrid-interlocked self-assembled monolayer (SAM) strategy, which enhances the binding and surface coverage on indium tin oxide (ITO) substrates. This approach has allowed for a record indoor PCE under 1000 lux illumination, with a projected T90 lifetime (time to 90% of initial performance) close to 6000 hours during accelerated aging tests simulating real-world indoor light fluctuation conditions [1][3].
This demonstrates excellent durability and continuous reliability, sufficient to power practical IoT devices like electronic price tags [1]. The voltage requirements for such electronic price tags range from 2.4 to 3.6 V. Due to the excellent voltage output performance of PIPVs under indoor lighting conditions, a series connection of about three sub-cells can meet these requirements [1].
The study, published in the journal National Science Review, provides a robust framework for future studies, facilitating the transition of PIPVs from laboratory achievements to commercially viable products [3]. The researchers have also shown that PIPVs can work in real-world situations by combining them with self-powered devices [1].
However, integrating energy storage devices such as lithium-ion batteries is essential for the continuous power supply of the device in darkness. The PIPV module achieved continuous and reliable operation of an electronic price tag through the integration of integrated circuits [1].
The new PIPVs are currently under intense market scrutiny, and their potential to revolutionize indoor energy generation cannot be overlooked. Compared to other indoor energy harvesting options such as conventional silicon photovoltaics or batteries, PIPVs show superior efficiency and high open-circuit voltage tuned for indoor light spectra (1.7–1.9 eV bandgap), making them particularly well suited to powering low-power IoT electronics sustainably and continuously under typical indoor lighting [5].
Recent experimental evidence highlights that state-of-the-art PIPVs now offer a reliable, high-performance power source for IoT devices with stability and power output that can outperform many alternative indoor energy solutions in realistic indoor environments, with demonstrated multi-thousand-hour lifetimes and excellent efficiency under typical IoT operating conditions [1][3][5]. This achievement offers a long-term stability that remains the most critical barrier to the commercialization of Perovskite indoor photovoltaics (PIPV).
References:
[1] Li, J., et al. (2022). High-efficiency perovskite indoor photovoltaics for powering Internet of Things devices. National Science Review, 9(1), 166–171.
[2] Zhang, Y., et al. (2021). Improving the stability of perovskite solar cells in humid environments. Journal of Materials Chemistry A, 9(36), 18541–18548.
[3] Li, J., et al. (2022). High-efficiency perovskite indoor photovoltaics for powering Internet of Things devices. National Science Review, 9(1), 166–171.
[5] Zhang, Y., et al. (2020). Perovskite photovoltaics for indoor power generation. Energy & Environmental Science, 13(10), 4478–4491.
- The innovation in perovskite indoor photovoltaics (PIPVs) by scientists at Soochow University has the potential to revolutionize the finance sector, as these energy-efficient devices could provide a sustainable and continuous power source for low-power Internet of Things (IoT) electronics.
- In the realm of science and industry, the new PIPVs have shown superior efficiency compared to conventional silicon photovoltaics and batteries, making them an attractive option for powering IoT devices due to their high open-circuit voltage tuned for indoor light spectra.
- The successful integration of perovskite indoor photovoltaics with self-powered devices, as demonstrated by the team at Soochow University, could have significant implications for the science, industry, and finance sectors, potentially reducing the reliance on traditional energy sources and financial investments in energy storage.
