Stable Deep Blue Emission with Unity Quantum Yield in Organic-Inorganic Halide Perovskite 2D Nanosheets Doped with Cerium and Terbium at High Concentrations

2021 ◽  
Author(s):  
Sumaiya Parveen ◽  
Ponnappa Kechanda Prasanna ◽  
Sudip Chakraborty ◽  
Pravat K. Giri
Keyword(s):  
Quantum Yield ◽  
Blue Emission ◽  
Lead Free ◽  
Deep Blue ◽  
Halide Perovskite ◽  
High Concentrations ◽  
Novel Strategy ◽  
2D Nanosheets

Despite recent efforts, achieving stable deep blue emission with near unity quantum yield from lead-free perovskite has remained a great challenge. Herein, we have developed a novel strategy to achieve...

High Quantum Yield Blue Emission from Lead-Free Inorganic Antimony Halide Perovskite Colloidal Quantum Dots

ACS Nano ◽  
2017 ◽  
Vol 11 (9) ◽  
pp. 9294-9302 ◽  
Author(s):  
Jian Zhang ◽  
Ying Yang ◽  
Hui Deng ◽  
Umar Farooq ◽  
Xiaokun Yang ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Yield ◽  
Blue Emission ◽  
Lead Free ◽  
Colloidal Quantum Dots ◽  
High Quantum Yield ◽  
High Quantum ◽  
Halide Perovskite

scholarly journals Lead-free, stable, high-efficiency (52%) blue luminescent FA3Bi2Br9 perovskite quantum dots

2020 ◽  
Vol 5 (3) ◽  
pp. 580-585 ◽  
Author(s):  
Yalong Shen ◽  
Jun Yin ◽  
Bo Cai ◽  
Ziming Wang ◽  
Yuhang Dong ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Quantum Yield ◽  
Room Temperature ◽  
High Efficiency ◽  
Blue Emission ◽  
Lead Free ◽  
Photoluminescence Quantum Yield ◽  
Perovskite Quantum Dots ◽  
First Time

Lead-free Bi-based perovskite FA3Bi2X9 (X = Cl, Br, and I) quantum dots (QDs) are synthesized for the first time at room temperature. The ligand-passivated FA3Bi2Br9 QDs exhibit blue emission at 437 nm with photoluminescence quantum yield (PLQY) up to 52%.

Simple cuprous iodide complex-based crystals with deep blue emission and high photoluminescence quantum yield up to 100%

2019 ◽  
Vol 33 (3) ◽  
pp. e4731 ◽  
Author(s):  
Liyang Wang ◽  
Yanxue Guo ◽  
Baoyi Yu ◽  
Wei Zhang ◽  
Tengzhou Li ◽  
...  
Keyword(s):  
Quantum Yield ◽  
Blue Emission ◽  
Deep Blue ◽  
Photoluminescence Quantum Yield ◽  
Iodide Complex

scholarly journals Polymer additive engineering of K2CuBr3 nanocrystalline films to achieve efficient and stable deep-blue emission

2021 ◽  
Author(s):  
Xinzhen Ji ◽  
Zhuangzhuang Ma ◽  
Xu Chen ◽  
Di Wu ◽  
Yongtao Tian ◽  
...  
Keyword(s):  
High Performance ◽  
Blue Emission ◽  
Nanocrystalline Films ◽  
Practical Applications ◽  
Deep Blue ◽  
Pristine Sample ◽  
Color Displays ◽  
Potential Applications ◽  
Novel Strategy ◽  
High Humidity Environment

Abstract Recently, non-toxic alternatives to lead-halide perovskites have been greatly sought after in optoelectronics applications. Deep-blue luminescent material is mainly required for fabricating white light source and expanding the color gamut of full-color displays. However, the synthesis of high-performance lead-free perovskite films with efficient blue emission is still a critical challenge currently, limiting their further practical applications. Here, a novel strategy is reported to prepare non-toxic and deep-blue-emitting K2CuBr3 nanocrystalline films by introducing polymer poly(methyl methacrylate) (PMMA) additives into the anti-solvent. It is found that the PMMA additives could effectively reduce the grain size and improve the crystallinity of K2CuBr3 films, resulting in an enhanced radiative recombination by defect passivation and confinement of excitons in the nanograins. As a result, the PMMA-treated K2CuBr3 films achieve a bright deep-blue light with color coordinates at (0.155, 0.042), and the photoluminescence quantum yield obtained is about 3.3 times that of the pristine sample. Moreover, the treated K2CuBr3 films exhibit a substantially enhanced stability under harsh environmental conditions, maintaining >70% of their initial performances in high humidity environment (50‒70% humidity, 190 h) or under uninterrupted ultraviolet light radiation (254 nm, 3.4 mW/cm2, 150 h). These findings pave a promising strategy for achieving efficient and stable deep-blue metal halide films, showing their potential applications in optoelectronic devices.

Pressure-Driven Reverse Intersystem Crossing: New Path toward Bright Deep-Blue Emission of Lead-Free Halide Double Perovskites

2021 ◽  
Vol 143 (37) ◽  
pp. 15176-15184
Author(s):  
Zhiwei Ma ◽  
Qian Li ◽  
Jiajun Luo ◽  
Shunran Li ◽  
Laizhi Sui ◽  
...  
Keyword(s):  
Blue Emission ◽  
Lead Free ◽  
Intersystem Crossing ◽  
Double Perovskites ◽  
Deep Blue ◽  
Pressure Driven

scholarly journals Lead-free halide perovskite Cs3Bi2Br9 single crystals for high-performance X-ray detection

2021 ◽  
Author(s):  
Xiang Li ◽  
Xinyuan Du ◽  
Peng Zhang ◽  
Yunqiu Hua ◽  
Lin Liu ◽  
...  
Keyword(s):  
Single Crystals ◽  
High Performance ◽  
Lead Free ◽  
X Ray ◽  
Halide Perovskite

Highly Emissive Halide Perovskite Nanocrystals: From Lead to Lead-Free

CrystEngComm ◽  
2021 ◽  
Author(s):  
Chunlong Li ◽  
Jie Li ◽  
Zhengping Li ◽  
Huayong Zhang ◽  
Yangyang Dang ◽  
...  
Keyword(s):  
Charge Carriers ◽  
Lead Free ◽  
Quantum Yields ◽  
Local Management ◽  
Perovskite Nanocrystals ◽  
Halide Perovskites ◽  
Halide Perovskite

Nanostructured halide perovskites have highly yielded record LEDs due to their higher versatility in the local management of charge carriers, which has enabled photoluminescence quantum yields (PLQYs) close to 100%....

Lead-Free, Blue Emitting Bismuth Halide Perovskite Quantum Dots

2016 ◽  
Vol 55 (48) ◽  
pp. 15012-15016 ◽  
Author(s):  
Meiying Leng ◽  
Zhengwu Chen ◽  
Ying Yang ◽  
Zha Li ◽  
Kai Zeng ◽  
...  
Keyword(s):  
Quantum Dots ◽  
Lead Free ◽  
Perovskite Quantum Dots ◽  
Halide Perovskite
Sign in / Sign up

Export Citation Format

Share Document