Surface morphology and electronic structure of bulk single crystal β-Ga2O3(100)

2009 ◽  
Vol 94 (8) ◽  
pp. 081906 ◽  
Author(s):  
T. C. Lovejoy ◽  
E. N. Yitamben ◽  
N. Shamir ◽  
J. Morales ◽  
E. G. Villora ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Surface Morphology ◽  
Single Crystal ◽  
Bulk Single Crystal

Nanoscale Surface Morphology and Rectifying Behavior of a Bulk Single-Crystal Organic Semiconductor

2006 ◽  
Vol 18 (12) ◽  
pp. 1552-1556 ◽  
Author(s):  
E. Menard ◽  
A. Marchenko ◽  
V. Podzorov ◽  
M. E. Gershenson ◽  
D. Fichou ◽  
...  
Keyword(s):  
Surface Morphology ◽  
Single Crystal ◽  
Organic Semiconductor ◽  
Bulk Single Crystal

Inside Front Cover: Nanoscale Surface Morphology and Rectifying Behavior of a Bulk Single-Crystal Organic Semiconductor (Adv. Mater. 12/2006)

2006 ◽  
Vol 18 (12) ◽  
pp. NA-NA
Author(s):  
E. Menard ◽  
A. Marchenko ◽  
V. Podzorov ◽  
M. E. Gershenson ◽  
D. Fichou ◽  
...  
Keyword(s):  
Surface Morphology ◽  
Single Crystal ◽  
Organic Semiconductor ◽  
Bulk Single Crystal ◽  
Front Cover

Incorporation, valence state, and electronic structure of Mn and Cr in bulk single crystal β–Ga2O3

2012 ◽  
Vol 111 (12) ◽  
pp. 123716 ◽  
Author(s):  
T. C. Lovejoy ◽  
Renyu Chen ◽  
E. N. Yitamben ◽  
V. Shutthanadan ◽  
S. M. Heald ◽  
...  
Keyword(s):  
Electronic Structure ◽  
Single Crystal ◽  
Valence State ◽  
Bulk Single Crystal

ФОРМИРОВАНИЕ ПЕРЕХОДНОГО СЛОЯ ALN НА ТЕМПЛЕЙТАХ 3С-SIC/SI(111) МЕТОДОМ АММИАЧНОЙ МОЛЕКУЛЯРНО-ЛУЧЕВОЙ ЭПИТАКСИИ

2020 ◽  
Vol 96 (3s) ◽  
pp. 148-153
Author(s):  
С.Д. Федотов ◽  
А.В. Бабаев ◽  
В.Н. Стаценко ◽  
К.А. Царик ◽  
В.К. Неволин
Keyword(s):  
Crystal Structure ◽  
Growth Rate ◽  
Low Temperature ◽  
Surface Morphology ◽  
Single Crystal ◽  
Root Mean Square Roughness ◽  
Rate Variation ◽  
Mean Square ◽  
Nucleation Layer ◽  
Low Temperature Epitaxy

Представлены результаты изучения морфологии поверхности и структуры слоев AlN, сформированных аммиачной МЛЭ на темплейтах 3C-SiC/Si(111) on-axis- и 4° off-axis-разориентации. Опробован технологический режим низкотемпературной эпитаксии зародышевого слоя AlN на поверхности 3C-SiC(111). Среднеквадратичная шероховатость поверхности (5 х 5 мкм) слоев AlN толщиной 150 ± 50 нм составила 2,5-3,5 нм на темплейтах 3C-SiC/Si(111) on-axis и 3,3-3,5 нм на 4° off-axis. Показано уменьшение шероховатости смачивающего слоя AlN при изменении скорости роста. Получены монокристаллические слои AlN(0002) со значениями FWHM (ω-геометрия) 1,4-1,6°. The paper presents the surface morphology and crystal structure of AlN layers formed by ammonia MBE on 3C-SiC/Si(111) on-axis and 4° off-axis disorientation. It offers the technological approach of low-temperature epitaxy of the AlN nucleation layer on the 3C-SiC (111) surface. Root mean square roughness (5 х 5 |xm) of AlN layers with thickness of 150 ± 50 nm was 2,5-3,5 nm onto on-axis templates and 3.3-3.5 nm onto 4° off-axis. It appears that the RMS roughness of the AlN surface is changing with the growth rate variation. Single-crystal AlN(0002) layers with FWHM values (ω-geometry) of 1.4-1.6° have been obtained.

scholarly journals Amorphous thin-film oxide power devices operating beyond bulk single-crystal silicon limit

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Yuki Tsuruma ◽  
Emi Kawashima ◽  
Yoshikazu Nagasaki ◽  
Takashi Sekiya ◽  
Gaku Imamura ◽  
...  
Keyword(s):  
Thin Film ◽  
Single Crystal ◽  
Flexible Substrate ◽  
Single Crystal Silicon ◽  
Bulk Single Crystal ◽  
Next Generation ◽  
Power Devices ◽  
Large Area ◽  
Crystal Silicon ◽  
Amorphous Thin Film

AbstractPower devices (PD) are ubiquitous elements of the modern electronics industry that must satisfy the rigorous and diverse demands for robust power conversion systems that are essential for emerging technologies including Internet of Things (IoT), mobile electronics, and wearable devices. However, conventional PDs based on “bulk” and “single-crystal” semiconductors require high temperature (> 1000 °C) fabrication processing and a thick (typically a few tens to 100 μm) drift layer, thereby preventing their applications to compact devices, where PDs must be fabricated on a heat sensitive and flexible substrate. Here we report next-generation PDs based on “thin-films” of “amorphous” oxide semiconductors with the performance exceeding the silicon limit (a theoretical limit for a PD based on bulk single-crystal silicon). The breakthrough was achieved by the creation of an ideal Schottky interface without Fermi-level pinning at the interface, resulting in low specific on-resistance Ron,sp (< 1 × 10–4 Ω cm2) and high breakdown voltage VBD (~ 100 V). To demonstrate the unprecedented capability of the amorphous thin-film oxide power devices (ATOPs), we successfully fabricated a prototype on a flexible polyimide film, which is not compatible with the fabrication process of bulk single-crystal devices. The ATOP will play a central role in the development of next generation advanced technologies where devices require large area fabrication on flexible substrates and three-dimensional integration.

Polymorphism and the influence of crystal structure on the luminescence of the opto-electronic material 4,4′-bis(9-carbazolyl)biphenyl

CrystEngComm ◽  
2014 ◽  
Vol 16 (33) ◽  
pp. 7621-7625 ◽  
Author(s):  
Cody J. Gleason ◽  
Jordan M. Cox ◽  
Ian M. Walton ◽  
Jason B. Benedict
Keyword(s):  
Crystal Structure ◽  
Electronic Structure ◽  
Electronic Material ◽  
Single Crystal ◽  
Charge Transport ◽  
Luminescent Properties ◽  
Electronic Structure Calculations ◽  
Electronic Charge ◽  
Single Crystal Structures ◽  
Structure Calculations

Single crystal structures, luminescent properties and electronic structure calculations of three polymorphs of the opto-electronic charge transport material 4,4′-bis(9-carbazolyl)biphenyl.

AFM Study of Surface Morphology of Aluminum Nitride Thin Films

1995 ◽  
Vol 388 ◽  
Author(s):  
Yoshihisa Watanabe ◽  
Yoshikazu Nakamura ◽  
Shigekazu Hirayama ◽  
Yuusaku Naota
Keyword(s):  
Thin Films ◽  
Surface Morphology ◽  
Substrate Temperature ◽  
Single Crystal ◽  
Room Temperature ◽  
Ion Beam ◽  
Soda Lime ◽  
Silicon Single Crystal ◽  
Soda Lime Glass ◽  
Average Roughness

AbstractAluminum nitride (AlN) thin films have been synthesized by ion-beam assisted deposition method. Film deposition has been performed on the substrates of silicon single crystal, soda-lime glass and alumin A. the influence of the substrate roughness on the film roughness is studied. the substrate temperature has been kept at room temperature and 473K and the kinetic energy of the incident nitrogen ion beam and the deposition rate have been fixed to 0.5 keV and 0.07 nm/s, respectively. the microstructure of the synthesized films has been examined by X-ray diffraction (XRD) and the surface morphology has been observed by atomic force microscopy(AFM). IN the XRD patterns of films synthesized at both room temperature and 473K, the diffraction line indicating the alN (10*0) can be discerned and the broad peak composed of two lines indicating the a1N (00*2) and a1N (10*1) planes is also observed. aFM observations for 100 nm films reveal that (1) the surface of the films synthesized on the silicon single crystal and soda-lime glass substrates is uniform and smooth on the nanometer scale, (2) the average roughness of the films synthesized on the alumina substrate is similar to that of the substrate, suggesting the evaluation of the average roughness of the film itself is difficult in the case of the rough substrate, and (3) the average roughness increases with increasing the substrate temperature.

Optical Absorption of CuInSe2 in Bulk Single Crystal

1981 ◽  
Vol 108 (1) ◽  
pp. K19-K22 ◽  
Author(s):  
C. Rincón ◽  
J. González ◽  
G. Sanchez Perez
Keyword(s):  
Optical Absorption ◽  
Single Crystal ◽  
Bulk Single Crystal
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