图1 全固态球磨合成CsPbX3 NCs示意图(a)和紫外光(365 nm)激发下的大产量红色钙钛矿荧光粉末照片(b)

Fig. 1 Scheme of the all-solid-state ball milling procedure for synthesis of CsPbX3 NCs (a) and optical image of large-scale red emission powder under UV light excitation (365 nm) (b)

图2 (a)不同组分CsPbX3 NCs的PL光谱, 内部插图为在正常日光和紫外光(黑色背景)下相应粉末的照片; (b)Pe-NCs的色域光谱(内黑线为NTSC)

Fig. 2 (a) PL emission spectra of CsPbX3 NCs powder, the corresponding optical images under normal daylight and UV light (black background) were exhibited inside; (b) Color gamut spectra of perovskite NCs (the inner black line indicating NTSC)

图3 不同成分CsPbX3 NCs的SEM照片表征, (a)~(i)分别对应图2中九个典型样品Fig. 3 SEM images of CsPbX3 NCs

图4 空气中稳定的CsPbI3 NCs粉末

Fig. 4 The air stability of CsPbI3 NCs powder (a) The PL stability exposed in air; (b) X-ray diffraction (XRD) pattern of CsPbI3 NCs powder; (c) Photographs of the powder samples with time changing under the sunlight (left) and UV light (right)

图5 CsPbI3 NCs的稳定性分析

Fig. 5 Analysis of air stability of CsPbI3 NCs (a) Stability test of CsPbI3 NCs powder with different BN quantity; (b) SEM image of CsPbI3 NCs; (c) Energy dispersive spectroscopy (EDS) mapping images of (b)

图6 Pe-NCs构筑的白光LED

Fig. 6 Proof-of-concept demonstration of white LED by blending green and red Pe-NCs on a commercial blue LED chip (a) Schematically depicts the packing method of white LED; (b) EL spectra of three typical devices exhibiting (1) green-white, (2) white, and (3) red-white; (c) Photographs of the white LED under different operating voltage

图7 白光LED的稳定性

Fig. 7 The stability of white-light LED (a) The luminance stability of white-light LED placed in the air measured at the voltage of 2.7 V; (b) The working stability of the white-light LED after continuous operating for 2 h

图S1 不同比例磨球制备CsPbBr3 纳米晶粉末的PL光谱

Fig. S1 PL intensity of CsPbBr3 NCs powder with different size of grind medium under the same test condition

图S2 不同球料比制备CsPbBr3纳米晶粉末的PL光谱强度

Fig. S2 PL intensity of CsPbBr3 NCs powder with different ball-to-powder ratio under the same condition

图S3 不同球磨转速下制备CsPbBr3 纳米晶粉末的PL光谱强度

Fig. S3 PL spectra of CsPbBr3 NCs powder with various rotation speed of the planetary mill

图S4 不同卤素配比的CsPbX3粉末XRD谱图

Fig. S4 The X-Ray diffraction spectra of CsPbX3 NCs powder with various halogen ratios

图S5 BN用量为0.2 g时CsPbI3粉末的PL光谱

Fig. S5 The PL spectrum of CsPbI3 powder adding amount of 0.2 g of BN

图S6 CsPbI3粉末的SEM照片和元素比例(a)以及EDS能谱(b)

Fig. S3 EDS information of CsPbI3 NCs powder (a) SEM image with corresponding atomic percentage information; (b) EDS spectrum of CsPbI3 NCs