Perovskite Photovoltaics for Artificial Light Harvesting

Abstract

Perovskites have encountered a growing interest as light‐absorbing materials for harvesting and recycling ambient light. This interest comes from the distinct and impressive intrinsic properties of these materials and is necessitated by the need for reliable and sustainable power supplies for wearable and portable internet of things (IoT) applications. Perovskite artificial light cells (PALCs; i. e., indoor perovskite photovoltaics) have been intensively explored, and thus their device performance has been rapidly augmented. In this review, we summarize and consolidate the research outputs of PALCs by focusing on the tuning of photo‐absorber and interlayer materials for efficient harvest and collection of artificial light sources. We also emphasize various challenges and possible future research directions that should be addressed for realizing a large market uptake of PALCs.

Perspectives for the conversion of perovskite indoor photovoltaics into IoT reality

“…40,52 However, the optimal E g value of popular perovskite is about 1.55 eV under AM 1.5G condition. 24 Hence, it is vital to broaden the perovskite bandgap to efficiently utilize the photons generated from the indoor light source. Take MAPbI 3 perovskite as an example, the electronic band structure mainly originates from the Pb 6s orbital and I 5p orbital.…”

“…[19][20][21] Due to the fast development of photovoltaic technologies, the investigation of IPVs may focus more on third-generation photovoltaic technologies including organic photovoltaics, dye-sensitized cells, and perovskite cells. [22][23][24][25][26] Among these, the perovskite cells exhibit tremendous potential for high-indoor efficiency devices owing to the desirable optoelectronic characteristics such as tunable bandgap (ranging from 1.2 eV to about 3.5 eV), high optical absorption coefficients (10 5 cm −1 ), small exciton binding energy (<100 meV) and long carrier diffusion length (over 1 µm). [27][28][29] Nowadays, the record indoor power conversion efficiency (PCE) of perovskite cells has exceeded 40% (under 1000 lux), which far exceeds other types of cells.…”

“…19–21 Due to the fast development of photovoltaic technologies, the investigation of IPVs may focus more on third-generation photovoltaic technologies including organic photovoltaics, dye-sensitized cells, and perovskite cells. 22–26…”