Efficient and Stable Thin‐Film Luminescent Solar Concentrators Enabled by Near‐Infrared Emission Perovskite Nanocrystals

Abstract

A novel triphenylphosphine (TPP) treatment strategy was developed to prepare the near‐infrared emission CsPbI3 nanocrystal (NC)‐polymer composite thin‐film luminescent solar concentrators (LSCs) featuring high absolute photoluminescence quantum yield (PLQY), low reabsorption, and high stability. The PL emission of the LSCs is centered at about 700 nm with 99.4±0.4 % PLQY and narrow full width at half maximum (FWHM) of 75 meV (30 nm). Compared with LSCs prepared with classic CsPbI3 NCs, the stability of the LSCs after TPP treatments has been greatly improved, even after long‐term (30 days) immersion in water and strong mercury‐lamp irradiation (50 mW cm−2). Owing to the presence of lone‐pair electrons on the phosphorus atom, TPP is also used as a photoinitiator, with higher efficiency than other common photoinitiators. Large‐area (ca. 75 cm2) infrared LSCs were achieved with a high optical conversion efficiency of 3.1 % at a geometric factor of 10.

Mn2+/Yb3+ Codoped CsPbCl3 Perovskite Nanocrystals with Triple‐Wavelength Emission for Luminescent Solar Concentrators

“…Most importantly, such codoped NCs with multiple emission channels hold a high potential to be applied in a wide range of applications, [45][46][47][48][49][50][51][52][53][54][55][56][57][58][59][60][61] including multiplexed biological labelling and sensing, [59] multi-channel photodetectors, [60] stimuli-responsive inks for coding, encryption and decryption, [61] and photon management devices. [45][46][47][48][49][50][51][52][53][54][55][56][57][58] Herein, we report a facile synthesis of Mn 2+ /Yb 3+ codoped CsPbCl 3 perovskite NCs (Scheme 1) through a hot-injection method. Owing to the completely separated energy relaxation channels among the intrinsic BG, Mn 2+ and Yb 3+ dopant emissions, the obtained Mn 2+ /Yb 3+ codoped CsPbCl 3 perovskite NCs exhibit a unique triple-wavelength emission profile simultaneously covering UV/blue (BG-PL), visible (Mn-PL) and NIR (Yb-PL) spectral regions.…”

“…Therefore, codoping both Mn 2+ and Yb 3+ ions into perovskite NCs can serve as a unique model system for studies of host-to-dopant and inter-dopant energy transfer mechanisms, as well as associated radiative and nonradiative decay pathways at each step. Most importantly, such codoped NCs with multiple emission channels hold a high potential to be applied in a wide range of applications, [45][46][47][48][49][50][51][52][53][54][55][56][57][58][59][60][61] including multiplexed biological labelling and sensing, [59] multi-channel photodetectors, [60] stimuli-responsive inks for coding, encryption and decryption, [61] and photon management devices. [45][46][47][48][49][50][51][52][53][54][55][56][57][58] Herein, we report a facile synthesis of Mn 2+ /Yb 3+ codoped CsPbCl 3 perovskite NCs (Scheme 1) through a hot-injection method.…”

Stable and Bright Pyridine Manganese Halides for Efficient White Light‐Emitting Diodes

“…Recently, lead halide perovskites are emerging as one of the most promising materials for solar cells, light emitting diodes (LEDs), displays and other optoelectronic devices. [ 1–11 ] Along with the development and application of these compounds in various fields, organic–inorganic hybrid lead halide perovskites such as MAPbX 3 and FAPbX 3 (MA = methylamine, FA = formamidinium, X = Cl, Br, I), which have the chance to combine the desirable properties from both of the inorganic and organic components at the molecular level, have drawn much attention,. The flexible structural tunability of organic–inorganic hybrid perovskites endows them a variety of crystal structures and superior performance, including high charge injection and transport capability, high PL quantum yield, narrow full width at half maximum (FWHM), and defect tolerant behavior.…”

Methanol-induced fast CsBr release results in phase-pure CsPbBr3 perovskite nanoplatelets

“…[1][2][3][4][5] Showing high photoluminescence (PL) quantum yields (QYs), 6,7 an optimal range of band gap energy values and high defect tolerance, [8][9][10][11] the perovskite nanomaterials hold great promise for solar cell, 12 photodetector, 13 laser, 14,15 light-emitting diode (LED) and display applications. [16][17][18][19][20][21][22][23][24][25][26][27][28][29][30] Being free from the organic component, the all inorganic CsPbX 3 (X À stands for halide ions) perovskites are compositionally stable up to their melting points which are in excess of 460 C, 31 and thus have attracted enormous interest.…”