Down-converting luminescent optoelectronics and their applications

Abstract

Luminescent materials and optoelectronics, particularly those that rely on down-conversion optical phenomena (i.e., involving a conversion from higher-energy photons into lower-energy photons), have garnered increasing interest for various photonics applications. Over the years, a plethora of down-converting luminescent materials has been actively explored, in particular for enhancing the collection and conversion efficiency of luminescent solar concentrators since the 80s. However, with the exploration of new down-converting luminescent materials, as well as the recent development of numerous emerging applications utilizing luminescent components for enhanced system performance, the technology is envisaged to expand beyond its use in luminescent solar concentrators. This perspective article aims at shedding light on the significance of incorporating luminescent materials and components for various emerging technologies related to optical-based communication, imaging, tracking, sensing, and data storage and encryption. The related opportunities and challenges are also outlined, which can potentially inspire practical pathways towards commercialization of luminescent-based optoelectronics and shape the way forward for the broader community.

Terbium-Doped CsPbI3 Glasses for High-Speed Visible-Light Communication

“…The −3-dB bandwidths for CsPbI 3 glass and Tb-doped CsPbI 3 glass were 11.9 and 9.4 MHz, respectively. The Tb-doped CsPbI 3 glass exhibited a narrower bandwidth due to an elongated PL lifetime, which was in agreement with the inverse relationship between the modulation bandwidth and average lifetime …”

“…The Tb-doped CsPbI 3 glass exhibited a narrower bandwidth due to an elongated PL lifetime, which was in agreement with the inverse relationship between the modulation bandwidth and average lifetime. 44 The high PLQY and reasonable bandwidth confirmed the feasibility of this material being utilized for VLC. Subsequently, a DCO-OFDM modulation was performed in the communication link.…”

Engineering Metal–Organic Frameworks with Tunable Colors for High-Performance Wireless Communication

“…The −3-dB bandwidths of Hf-BT-fcu-MOF, Hf-BI-fcu-MOF, Zr-BT-fcu-MOF, and Zr-BI-fcu-MOF are 150.0, 118.5, 111.5, and 62.1 MHz, respectively. 11 Moreover, the direct current-biased optical orthogonal frequency-division multiplexing (DCO-OFDM) was imple-mented with individual MOF−polymer composite films. The hardware components and offline processing steps are shown in Figure S7.…”

“…The exported frequency response spectra were normalized by the value at the initial frequency, as shown in Figure a with the −3-dB bandwidth marked with the dashed line. The −3-dB bandwidths of Hf-BT- fcu -MOF, Hf-BI- fcu -MOF, Zr-BT- fcu -MOF, and Zr-BI- fcu -MOF are 150.0, 118.5, 111.5, and 62.1 MHz, respectively …”

“…This is due to the shortage of available RF spectra and limited bandwidth . Optical wireless communications (OWCs), on the other hand, offer unlicensed and secure full spectral bandwidths ranging from ultraviolet (UV) to infrared, providing a new pathway for achieving uninhibited growth in high-speed and low-latency data transmission. − However, conventional color-converting phosphors used in high-speed OWCs are based solely on ceramic or perovskite materials, which are composed of environmentally unfriendly elements, and require harsh synthesis conditions with a high fabrication cost, significantly limiting their commercialization potential. ,,− …”