Triple-cation perovskite solar cells for visible light communications

Abstract

Hybrid perovskite materials are widely researched due to their high absorptivity, inexpensive synthesis, and promise in photovoltaic devices. These materials are also of interest as highly sensitive photodetectors. In this study, their potential for use in visible light communication is explored in a configuration that allows for simultaneous energy and data harvesting. Using a triple-cation material and appropriate device design, a new record data rate for perovskite photodetectors of 56 Mbps and power conversion efficiencies above 20% under white LED illumination are achieved. With this device design, the −3 dB bandwidth is increased by minimizing the dominating time constant of the system. This correlation between the bandwidth and time constant is proved using measurements of time-resolved photoluminescence, transient photovoltage, and device resistance.

Simultaneous Wireless Data and Power Transfer for a 1-Gb/s GaAs VCSEL and Photovoltaic Link

“…The data rate is shown to be massively increased by 21.9 and 13.3 times for the GaAs VCSEL and PV link in [6] compared with the organic and perovskite solar cell based links, respectively. This is attributed to the very large 3-dB bandwidth of 24.5 MHz of the GaAs PV cell measured in [9] compared to the relevant values of 1.3 MHz [4] and 289 kHz [10] measured for the organic and perovskite solar cell, respectively. A remarkable boost of 6.2 and 6.6 times in the end-to-end dc power efficiency is shown to be achieved for the GaAs laser and PV link developed in [6] compared with the 1-m link using an organic solar cell and the 0.4-m link based on a perovskite solar cell, respectively.…”

“…This is mostly due to the high power conversion efficiency of the GaAs PV cell, i.e. 42.4% in [6], compared to those of 7% and 6.5% for an organic and a perovskite solar cell measured in [4] and [10], respectively. All of the experimental studies given in Table I report harvested power levels of TABLE I STATE OF THE ART IN OPTICAL SIMULTANEOUS WIRELESS INFORMATION AND POWER TRANSFER (SWIPT) a few mW that are considered to be sufficient for ultralow-power IoT sensors such as RF identification transponder chips [14].…”

“…This improvement in data rate is attributed to the 3-dB bandwidth of 1.3 MHz for the organic cell as a result of its decreased active area (only 8 mm 2 ) and, thus, capacitance. The state-of-the-art data rate of SLIPT systems is further improved in [10] by using a triple-cation perovskite solar device at the receiver. In particular, 53-Mb/s data communication and power harvesting of 3.3 mW are shown to be attained using a 40-cm wireless link.…”

“…In particular, 53-Mb/s data communication and power harvesting of 3.3 mW are shown to be attained using a 40-cm wireless link. The same LD with that in [4] was used and the received optical power from the perovskite solar cell is reported to be 50 mW [10].…”

Photovoltatronics: intelligent PV-based devices for energy and information applications

“…For instance, it has been possible to achieve a data transfer of 56 Mbps by using a triple-cation perovskite solar cells optimized for visual light communication with a custom active layer thickness. 174 performance as a receiver (higher bandwidth) may clash with design requirement for higher efficiency (increased power production). Future research should focus on the design of the solar cell that balances these two aspects.…”