Ultrastable Perovskite Nanocrystals in All‐Inorganic Transparent Matrix for High‐Speed Underwater Wireless Optical Communication

Abstract

The key features of lead halide perovskites, including short emission lifetime and excellent luminous efficiency in the green emission region, perfectly match the strict requirements of underwater wireless optical communication (UWOC). However, the poor stability of perovskite nanocrystals (NCs) restricts its application under water and no relevant application research has been reported. Here, extremely stable CsPbBr3 NCs in all‐inorganic amorphous glass synthesized by all‐solid reaction without any organic ligand are reported. The products achieve high photoluminescence quantum yield (70%) as well as excellent stability toward water, thermal treatment (200 °C in air) and intensive laser irradiation (3.6 kW cm−2). The authors also raise that the refraction index could strongly influence the lifetime values according to the oscillator strength of radiative transitions. The large refraction index of the glass matrix enhances the radiative transition rates of CsPbBr3 NCs (decay time 3.22 ns). At last, the first application of perovskite NCs for UWOC is demonstrated, achieving a bandwidth as high as 180 MHz and data rates of 185 Mbps.

Micro‐Nano Structure Functionalized Perovskite Optoelectronics: From Structure Functionalities to Device Applications

“…with high-resolution imaging for electrochemical eye. [297,298] In addition, the utilization of micro-nano structure in colorful and semitransparent optoelectronics provides possibility to meet the application of intelligent building. ii.…”

Ultra‐Thermostability of Spatially Confined and Fully Protected Perovskite Nanocrystals by In Situ Crystallization

“…To further demonstrate the outstanding thermal stability of the SCP@MSNs‐PDMS film, the comparisons of the PL retention and cycle number after heating–cooling cycle of SCP@MSNs‐PDMS film with some latest reported results were shown in Figure 3j. [ 26,33–40 ] It can be observed that even being tested at the highest testing temperature and longest heating–cooling cycles, SCP@MSNs‐PDMS film represented by the asterisk presented the best room temperature PL retention compared with the results reported in the literature, which further proved the ultra‐excellent thermal stability of SCP@MSNs‐PDMS film.…”

“…To further demonstrate the outstanding thermal stability of the SCP@MSNs-PDMS film, the comparisons of the PL retention and cycle number after heating-cooling cycle of SCP@MSNs-PDMS film with some latest reported results were shown in Figure 3j. [26,[33][34][35][36][37][38][39][40] It can be observed that even being tested at the highest testing temperature and longest heating-cooling cycles, SCP@MSNs-PDMS film represented by the asterisk presented Small 2022, 18, 2107452 The emission wavelengths of g) CsPbBr 3 QDs, h) SCP-PDMS film, and i) SCP@MSNs-PDMS film after heating-cooling cycle tests at different temperatures (60, 100, 150, 200 °C). j) The comparisons of the PL retention and cycle number after heating-cooling cycle of our results with some latest reported results.…”

Precipitation of cesium lead halide perovskite nanocrystals in glasses based on liquid phase separation

“…After the pioneering work by Ai et al, CsPbX 3 PNCs have been successfully precipitated in borosilicate glass, 31,32 borogermanate glass, 33,34 borophosphate glass, 30,35 tellurite glasses, 36,37 oxyfluoride glasses, 38 and chalcogenide glasses. 39 Potential applications of these CsPbX 3 PNCs embedded glasses such as lightemitting diodes, 33,36,37 anticounterfeitings, 40 data storage media, 41 scintillators, 42 color filters, 43 and undersea water communications 44 have been demonstrated.…”