Photo-/electro-luminescence enhancement of CsPbX3 (X = Cl, Br, or I) perovskite quantum dots via thiocyanate surface modification

Bao，Zhen1; Wang，Weigao2; Tsai，Hsin Yu1; Wang，Hung Chia1; Chen，Shuming2; Liu，Ru Shi1,3,4

2020

10.1039/c9tc05448k

Journal of Materials Chemistry C   影响因子和分区

2050-7534

2050-7526

All-inorganic lead halide perovskite quantum dots (PQDs) are among the most highly applicable luminescent materials for wide-color-gamut displays. Since the development of all-inorganic PQDs, several methods have been implemented to enhance their photo-luminescence quantum yield (PLQY) and stability. However, most treatment procedures only focus on optimizing the green CsPbBr perovskite quantum dots. In this work, we extended the usage of SCN ligands to modify the surface of blue, green, and red PQDs for improving their luminescence properties. The presence of SCN on the surface of PQDs was confirmed via Fourier-transform infrared spectroscopy and energy-dispersive X-ray spectroscopy. On the basis of the X-ray photoelectron spectra, the surface modification of PQDs enhanced the PL intensity and PLQY due to the removal of Pb surface defects. The modified PQDs were applied to quantum dot light-emitting diodes (QLEDs), and the performance of the devices was satisfactory, thereby indicating their potential application in high-quality displays.

SCI ; EI

英语

通讯

[107L9006]

Materials Science ; Physics

Materials Science, Multidisciplinary ; Physics, Applied

WOS:000509343800026

Royal Society of Chemistry

20200508112909

Bromine compounds ; Cesium compounds ; Display devices ; Energy dispersive spectroscopy ; Fourier transform infrared spectroscopy ; Lead compounds ; Luminescence ; Nanocrystals ; Organic light emitting diodes (OLED) ; Perovskite ; Photoelectron spectroscopy ; Semiconductor quantum dots ; Surface defects

Minerals:482.2 ; Semiconductor Devices and Integrated Circuits:714.2 ; Computer Peripheral Equipment:722.2 ; Light/Optics:741.1 ; Nanotechnology:761 ; Chemistry:801 ; Materials Science:951

2-s2.0-85078705829

Scopus

1.Department of Chemistry,National Taiwan University,Taipei,106,Taiwan
2.Department of Electrical and Electronic Engineering,Southern University of Science and Technology,Shenzhen,518055,China
3.Advanced Research Centre of Green Materials Science and Technology,National Taiwan University,Taipei,106,Taiwan
4.Department of Mechanical Engineering,Graduate Institute of Manufacturing Technology,National Taipei University of Technology,Taipei,106,Taiwan

Bao，Zhen,Wang，Weigao,Tsai，Hsin Yu,et al. Photo-/electro-luminescence enhancement of CsPbX3 (X = Cl, Br, or I) perovskite quantum dots via thiocyanate surface modification[J]. Journal of Materials Chemistry C,2020,8(3):1065-1071.

Bao，Zhen,Wang，Weigao,Tsai，Hsin Yu,Wang，Hung Chia,Chen，Shuming,&Liu，Ru Shi.(2020).Photo-/electro-luminescence enhancement of CsPbX3 (X = Cl, Br, or I) perovskite quantum dots via thiocyanate surface modification.Journal of Materials Chemistry C,8(3),1065-1071.

Bao，Zhen,et al."Photo-/electro-luminescence enhancement of CsPbX3 (X = Cl, Br, or I) perovskite quantum dots via thiocyanate surface modification".Journal of Materials Chemistry C 8.3(2020):1065-1071.