Improving anion-exchange efficiency and spectrum stability of perovskite quantum dots via an Al³⁺ bonding-doping synergistic effect

Abstract

Anion-exchange reactions have been recognized as a vital and facile post-synthetic method to precisely manipulate the emission spectra of perovskite quantum dots (QDs). However, the anion-exchange process often induces adverse...

Surface co-modification enabling efficient and spectrally stable mixed-halide blue light-emitting diodes

“…[6][7][8][9][10] Generally, blue emission can be achieved by modulating the quasi-two-dimensional (quasi-2D) quantum well distribution, enhancing the quantum confinement effect of CsPbBr 3 , or doping Cl species to change the degree of orbital overlap, respectively. [11][12][13][14][15][16][17][18][19][20] In recent years, there has been a significant focus on developing blue PeLEDs based on the first two techniques. However, it is reported that low-dimensional perovskites exhibit inefficient energy transfer, spectral broadening and even multi-peak emission owing to their complicated phase distribution.…”

Pure red CsPbBr0.96I2.04/SiO2 core/shell nanocrystals with simultaneous high efficiency and stability for Mini-LEDs

“…For instance, trioctyl phosphine oxide (TOP), aluminum( iii ) acetylacetonate (Al(acac) 3 ), and polymethyl methacrylate (PMMA) have been used to passivate mixed halide perovskite NCs to reduce the defect density and inhibit phase separation. 26–28 Nevertheless, the overall stability of these mixed perovskite NCs shows a limited improvement under the synergistic effects of light and heat, which are usually the case in LED backlights. Thus, balancing the stability and optical properties of mixed halide perovskite NCs is the key to their practical display applications.…”