lead bromide
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2022 ◽  
Vol 124 ◽  
pp. 111955
Author(s):  
A.M. El-naggar ◽  
Mohamed Bakr Mohamed ◽  
Rawabi E. Alatawi ◽  
Zein K. Heiba ◽  
M.M. Osman ◽  
...  

Author(s):  
Shiyu Xing ◽  
Yaxiao Lian ◽  
Runchen Lai ◽  
Xuhui Cao ◽  
Minhui Yu ◽  
...  
Keyword(s):  

2022 ◽  
Author(s):  
Qian Xiong ◽  
sihao huang ◽  
Zijun Zhan ◽  
Juan Du ◽  
Xiaosheng Tang ◽  
...  

Nanoscale ◽  
2022 ◽  
Author(s):  
Ignacio Rosa-Pardo ◽  
Rita Belen Cevallos-Toledo ◽  
Lakshminarayana Polavarapu ◽  
Raul Arenal ◽  
Raquel E. Galian ◽  
...  

The long-standing debate about the morphology of colloidal methylammonium lead bromide perovskites nanocrystals, manufactured by our nontemplate synthetic strategy reported in 2014, is now resolved; specifically, the highest green emissive...


2022 ◽  
pp. 118485
Author(s):  
Soumen Sardar ◽  
Prabir Maity ◽  
Mona Mittal ◽  
Subhadeep Chakraborty ◽  
Anamika Dhara ◽  
...  

2022 ◽  
Author(s):  
Ramashanker Gupta ◽  
Vinay Gupta ◽  
Ram Datt ◽  
Sandeep Arya ◽  
Animesh Pandey ◽  
...  

In this work, the growth of formamidinium (FA) based mixed halide perovskite single-crystal via inverse temperature crystallization method is investigated and characterized to detect its photosensitive properties. The structural characterization...


Photonics ◽  
2021 ◽  
Vol 9 (1) ◽  
pp. 4
Author(s):  
Saif M. H. Qaid ◽  
Hamid M. Ghaithan ◽  
Khulod K. AlHarbi ◽  
Abrar F. Bin Ajaj ◽  
Bandar Ali Al-Asbahi ◽  
...  

The high crystal quality of formamidium lead bromide perovskite (CH(NH2)2PbBr3 = FAPbBr3) was infiltrated in a mesoporous TiO2 network. Then, high-quality FAPbBr3 films were evaluated as active lasing media, and were irradiated with a picosecond pulsed laser to demonstrate amplified spontaneous emission (ASE), which is a better benchmark of its intrinsic suitability for gain applications. The behavior was investigated using two excitation wavelengths of 440 nm and 500 nm. Due to the wavelength-dependent absorbance spectrum and the presence of a surface adsorption layer that could be reduced using the shorter 440 nm wavelength, the ASE power dependence was strongly reliant on the excitation wavelength. The ASE state was achieved with a threshold energy density of ~200 µJ/cm2 under 440 nm excitation. Excitation at 500 nm, on the other hand, needed a higher threshold energy density of ~255 µJ/cm2. The ASE threshold carrier density, on the other hand, was expected to be ~4.5 × 1018 cm−3 for both excitations. A redshift of the ASE peak was detected as bandgap renormalization (BGR), and a BGR constant of ~5–7 × 10−9 eV cm was obtained.


Crystals ◽  
2021 ◽  
Vol 11 (12) ◽  
pp. 1531
Author(s):  
Geunpyo Choe ◽  
Hyemin Kwon ◽  
Ilhwan Ryu ◽  
Sanggyu Yim

An X-ray-attenuation-based in vivo imaging can be a promising candidate for real-time detection of cancer in an early stage due to its significantly longer penetration depth compared to currently investigated fluorescence-emission-based imaging techniques. It has recently been demonstrated that this novel concept of imaging is feasible using cesium lead bromide (CPB) quantum dots (QDs) stably embedded in silicon dioxide (SiO2) nanoparticles (NPs). However, further improvements are necessary to realize its practical use, especially in terms of X-ray attenuation efficiency. In this study, we have found that the X-ray attenuation capability of CPB/SiO2 NPs was significantly enhanced by embedding an organic X-ray scintillator, 2,5-diphenyloxazole (PPO), together with CPB QDs in the NPs. The embedment not only solved the water dispersibility and stability problem of PPO, but also significantly increased the Hounsfield unit of the NPs, which was proportional to the degree of X-ray attenuation, by 2.7 times.


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