The internet of things revolution requires efficient, easy-to-integrate energy harvesting. Here, we report indoor power generation by flexible perovskite solar cells (PSCs)
Indoor ice arenas, as large-scale constructions, require sophisticated energy systems to maintain the ice surface within the arena. However, the presence of the ice surface
Highly efficient indoor organic solar cells by voltage loss minimization through fine-tuning of polymer structures. ACS Appl. Mater. Interfaces, 11 (2019) Dye-sensitized
We also provide a summary of the development of Si-based PVs, DSSCs, OSCs, QDSCs, and PSCs under indoor light conditions. Despite exciting progress during past decades, it is still challenging to design high
The first solar cell converted less than 1% [16], [17] of incident light into electrical power and later it took more than a century for increasing the efficiency of a solar cell to 4% by
The high-power conversion efficiency of flexible perovskite photovoltaics (PPV) at low light environment and their low-cost manufg. processes, render PPV superior to conventional rigid photovoltaics targeting
With a bandgap of 2 eV, it is suitable for IPV application and was the first technology incorporated into low-power indoor electronics (the solar/light-powered calculator
An efficient cooling system can effectively reduce the temperature and improve the power generation performance of photovoltaic cells. In this study, spray cooling is applied
Terminal alkyl substitution in an A–D–A-type nonfullerene acceptor: simultaneous improvements in the open-circuit voltage and short-circuit current for efficient indoor power generation†
Recent reports highlight the true potential of solar PV for large-scale electricity generation in a zero net emission scenario, allowed by expected efficiency improvements (at the sub-cell and module levels), but also through scaling
Additionally, photovoltaic power generation efficiency is generally higher in spring and autumn than in summer and winter, with enhanced power generation performance observed. At an inclination angle of 40°,
The DSC achieves an external quantum efficiency for photocurrent generation that exceeds 90% across the whole visible domain from 400 to 650 nm, and achieves power outputs of 15.6 and 88.5 μW...
In a world increasingly committed to sustainable energy solutions, the development of efficient indoor solar cells is a significant milestone. Chemists at Kaunas University of Technology (KTU) in Lithuania have

Solar cells This article has been updated Abstract Solar cells that operate efficiently under indoor lighting are of great practical interest as they can serve as electric power sources for portable electronics and devices for wireless sensor networks or the Internet of Things.
The efficiencies of the solar cells at indoor conditions were calculated with equation (2), where Pout(W cm–2) is the output power of the solar cell and Pin(W cm–2) is the incident power of the light source, measured by a calibrated Si-diode or the lux meter:
PVs are also capable of generating power (even though relatively low power) by harvesting artificial indoor light. Although sunlight is not available in all locations and at all times, ambient indoor lighting is always available to supply energy for operating low-power IoT devices.
Under indoor conditions, however this scenario reverses when light source is FC or LED suggesting Indoor Organic Photovoltaics (IOPVs) are better performers compared to silicon solar cells.
Until recently, with the advent of the Internet of Things (IoT), indoor photovoltaics (IPVs) that convert indoor light into usable electrical power have been recognized as the most promising energy supplier for the wireless devices including actuators, sensors, and communication devices connected and automated by IoT technology (5, 6).
In this study, we performed a detailed review of the development of various solar cells for indoor applications. It is thus observed that although ISCs are dominating the outdoor solar cell market, they are not suitable for use as indoor light-harvesting units because of their low bandgap energy and poor mechanical flexibility.
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