在间接转换无形探测器中优化和光导体厚度.
Kaitlin Hellier1, Hamid Mirzanezhad1, Molly McGrath1
1Electrical and Computer Engineering, University of California, Santa Cruz, 1156 High St., Santa Cruz, CA, USA, 95064.
概括
更厚的无形- (a-Se-Te) 和烯层通过减少暗流和滞后,提高了雪崩光探测器的性能. 然而,较薄的层会导致信号损失和剩余电荷,因此需要更厚的层来实现最佳的成像.
科学领域:
- 材料科学 材料科学 材料科学
- 医学成像物理 医学成像物理
- 半导体设备物理 半导体设备物理
背景情况:
- 无形 (a-Se) 是用于间接转换成像中的光探测器的具有成本效益的材料.
- A-Se的宽带间隔限制了对更长波长的灵敏度,例如来自Csi:Tl闪器的550nm光.
- 将纳入a-Se (a-Se-Te) 减少了带隙,提高了对更长波长的灵敏度.
研究的目的:
- 评估不同无形- (a-Se-Te) 和烯层厚度对光探测器性能的影响.
- 为了优化层厚度,使得间接转换探测器的灵敏度高,泄漏率低,延迟和幽灵效应最小.
- 为了了解暗电流和由烯层厚度影响的残余电荷之间的权衡.
主要方法:
- 单像素Se-Te光探测器设备的制造和测试,具有可变的烯和a-Se-Te层厚度.
- 分析设备性能指标,包括暗电流,信号水平,延迟和剩余电荷.
- 研究烯层作为阻塞孔层的作用.
主要成果:
- 较厚的a-Se-Te和parylene层导致较低的暗电流,预期的信号水平和减少的延迟.
- 较薄的a-Se-Te和parylene层导致信号损失和残余电荷积累.
- 烯层的厚度会影响暗电流和残余电荷之间的权衡.
结论:
- 优化a-Se-Te和parylene层厚度对于实现高性能间接转换探测器至关重要.
- 较厚的光导体和烯层是必要的,以有效地阻塞孔,并提高整体设备性能.
- 需要进一步优化,以平衡高级成像应用的暗电流和残余电荷.
相关概念视频
01:18Imaging Biological Samples with Optical Microscopy
Optical microscopy uses optic principles to provide detailed images of samples. Antonie van Leeuwenhoek designed the first compound optical microscope in the 17th century to visualize blood cells, bacteria, and yeast cells. In 1830, Joseph Jackson Lister created an essentially modern light microscope. The 20th century saw the development of microscopes with enhanced magnification and resolution.
In optical microscopy, the specimen to be viewed is placed on a glass slide and clipped on the stage...
In optical microscopy, the specimen to be viewed is placed on a glass slide and clipped on the stage...
01:26Phase Contrast and Differential Interference Contrast Microscopy
Phase-Contrast Microscopes
In-phase-contrast microscopes, interference between light directly passing through a cell and light refracted by cellular components is used to create high-contrast, high-resolution images without staining. It is the oldest and simplest type of microscope that creates an image by altering the wavelengths of light rays passing through the specimen. Altered wavelength paths are created using an annular stop in the condenser. The annular stop produces a hollow cone of...
In-phase-contrast microscopes, interference between light directly passing through a cell and light refracted by cellular components is used to create high-contrast, high-resolution images without staining. It is the oldest and simplest type of microscope that creates an image by altering the wavelengths of light rays passing through the specimen. Altered wavelength paths are created using an annular stop in the condenser. The annular stop produces a hollow cone of...