Vincenzo Pecunia, Soochow University
Lead-Free Perovskite-Inspired Semiconductors for Indoor Photovoltaics
Written by Victor A. Rodriguez-Toro
Vicenzo Pecunia and collaborators highlight a prediction in which we should expect one trillion of Internet-of-things (IoT) devices by 2035. The use of ambient energy harvesters can enable the success of this technology, including indoor photovoltaics (IPV). Perovskite photovoltaics (PPV) has emerged as an attractive energy harvester because its power conversion efficiency (PCE) is higher (e.g., amorphous hydrogenated silicon) or comparable (crystalline) to industry-standard IPV technologies. However, the toxicity of some types of perovskites (e.g., lead-based ones) has motivated researchers to find safer materials which preserve their outstanding optoelectronics properties. Perovskite-inspired systems based on antimony or Sb (i.e., Cs3Sb2ClxI0-x) and bismuth or Bi (i.e., BiOI) were found to have a PCE of 4–5% when tested under indoor illumination conditions (fluorescent and white light LED). Furthermore, it is shown to be the first-known demonstration of printed electronics (~10,000 thin-film transistors) powered by IPV processed from solution.