期刊文献+
共找到4篇文章
< 1 >
每页显示 20 50 100
Thermodynamically induced crystal restructuring to make CsPbCl_(3) single crystal films for weak light detection
1
作者 Xiyan Pan Tai An +8 位作者 Jie Sun Hua Dong Zhu Ma Guangxing Liang Yongbo Yuan Yang Li Wuqiang Wu Yong Ding Liming Ding 《Nano Research》 SCIE EI CSCD 2024年第11期9775-9783,共9页
CsPbCl_(3) perovskite is considered a highly promising material for ultraviolet (UV) photodetectors due to its exceptional thermal stability and excellent short-wavelength light response. However, its high lattice ene... CsPbCl_(3) perovskite is considered a highly promising material for ultraviolet (UV) photodetectors due to its exceptional thermal stability and excellent short-wavelength light response. However, its high lattice energy and low polarizability result in extremely low solubility in conventional solvents, making the synthesis of CsPbCl_(3) single crystals a significant challenge. In this study, we propose a novel thermodynamically induced crystal restructuring (TICR) process that can transform microcrystalline films (MCFs) into single crystal films (SCFs) within a short period. This method, for the first time, has successfully achieved the synthesis of centimeter-sized CsPbCl_(3) SCFs and the mechanism has been explored in depth using in-situ techniques. Furthermore, we report the first instance of a CsPbCl_(3) SCF UV photodiode, which exhibits a record-breaking on/off ratio of 3.32 × 10^(7) and a detectivity of up to 1.15 × 10^(14) Jones under 0 V bias. It demonstrates excellent response even under weak light conditions of 10 nW·cm^(−2) and maintains outstanding stability with almost no performance degradation after 15 months. This study provides a novel approach for the synthesis of perovskite single crystals and holds significant potential for advancing the development of high-performance optoelectronic devices. 展开更多
关键词 CsPbCl3 single crystal film crystal restructuring PHOTODIODE ultraviolet detector
原文传递
Physical and Chemical Properties of GdN: A Critical Comparison between Single Crystals and Thin Films, Theory and Experiment
2
作者 Peter Wachter 《Advances in Materials Physics and Chemistry》 2016年第3期28-46,共19页
Since about 10 years, there is a controversy about physics and chemistry of GdN between stoichiometric (tested) large single crystals and off-stoichiometric thin films. GdN single crystals are anti-ferromagnetic for a... Since about 10 years, there is a controversy about physics and chemistry of GdN between stoichiometric (tested) large single crystals and off-stoichiometric thin films. GdN single crystals are anti-ferromagnetic for applied magnetic fields of only 10 Oe, become ferromagnetic for excess electrons and larger magnetic fields. They are semimetallic. Thin films are ferromagnetic and semiconductors. Over the time, many experiments have been performed on both systems and the physics in each system is consistent. Band structure computations either yield ferromagnetic semimetals or ferromagnetic semiconducting thin films. There seems to be two incompatible worlds, those of single crystals and those of thin films. In the present work, the author compares directly the various measurements and calculations and gives reasons for their different results. 展开更多
关键词 Rare Earth Nitrides Preparation Methods Magnetic Electrical and Optical Measurements on single crystals and Thin films
下载PDF
Al_xGa_(1-x)As/GaAs Solar Cell Grown by Multi-substrate Liquid Phase Epitaxy
3
作者 CHENTingjin YUANHairong 《Semiconductor Photonics and Technology》 CAS 1998年第2期128-133,共6页
A novel horizontal push-pull multi-substrate epitaxy boat with three separate cells is introduced in this article, with which multi-substrate LPE processing is feasible in horizontal LPE furnace. The processes of LPE ... A novel horizontal push-pull multi-substrate epitaxy boat with three separate cells is introduced in this article, with which multi-substrate LPE processing is feasible in horizontal LPE furnace. The processes of LPE AlxGa1-x)As/ GaAs solar cells are studied and the efficiency of the solar cells achieved 19.8% (AMO, 25℃, 120 mW/cm2). 展开更多
关键词 Liquid Phase Epitaxy Semiconductor Materials single crystal film Solar Cell
下载PDF
Synchrotron radiation photoemission spectrum study on K_3C_(60) film
4
作者 李宏年 徐亚伯 +5 位作者 鲍世宁 李海洋 何丕模 钱海杰 刘风琴 奎热西.易卜拉欣 《Science China Mathematics》 SCIE 2000年第11期1189-1194,共6页
K3C60 single crystal film was prepared on the cleaved (111) surface of C60 single crystal. Synchrotron radiation angle-resolved photoemission spectra were measured at normal emission with sample temperature at - 150K.... K3C60 single crystal film was prepared on the cleaved (111) surface of C60 single crystal. Synchrotron radiation angle-resolved photoemission spectra were measured at normal emission with sample temperature at - 150K. Up to four subpeaks of LUMO-derived band were observed. These sub-peaks exhibit distinct energy dispersions which resemble in general the theoretical ones calculated for K3C60 at low temperature with the so-called one-dimensional disordered structure. But there is large deviation of experimental sub-band intervals from the theoretical values. This result is meaningful for the studies of the physical properties of alkali-doped C60 solids, e.g. the mechanism for superconductivity. 展开更多
关键词 K_3C_(60)single crystal film SR-ARPES conduction band structure.
原文传递
上一页 1 下一页 到第
使用帮助 返回顶部