单晶MAPbCl3薄膜用于照片和X射线电压
Waqas Zia1,2, Mahdi Malekshahi Byranvand1, Vishal Yeddu3
1Institute for Photovoltaics (ipv), University of Stuttgart 70569 Stuttgart Germany mahdi.malekshahi@ipv.uni-stuttgart.de michael.saliba@ipv.uni-stuttgart.de.
概括
单晶甲基三化 (MAPbCl3) 矿膜是使用空间限制的逆温度结晶来制造的. 这些膜显示出较少的缺陷,使得矿太阳能电池和X射线检测效率高.
科学领域:
- 材料科学 材料科学 材料科学
- 固态物理 固态物理
- 光电学是指光电子产品.
背景情况:
- 甲基三化 (MAPbCl3) 矿提供了宽3 eV带隙,适合透明电子.
- 从溶液中结晶均多晶MAPbCl3薄膜存在一些挑战.
- 单晶MAPbCl薄膜可以更均地生长.
研究的目的:
- 通过空间有限的逆温度结晶 (ITC) 来演示单晶MAPbCl3薄膜的制造.
- 评估制造的薄膜的材料质量和缺陷密度.
- 评估这些薄膜在矿太阳能电池 (PSC) 和X射线检测应用中的性能.
主要方法:
- 在导电玻璃上制造单晶MAPbCl3薄膜,通过空间限制的ITC.
- 薄膜质量的表征,重点关注带隙内的缺陷发射.
- 在一个阳光照射下制造和测试PSC.
- 对X射线电压性能的评估.
主要成果:
- 单晶MAPbCl3薄膜成功地生长了最小的深层缺陷.
- 由此产生的PSC实现了1.64V的开放电路电压 (VOC) 和1.1%的功率转换效率 (PCE).
- 在60kV的X射线辐射下,X射线电压测量显示VOC为0.89V,输出功率为3.57μW cm-2.
结论:
- 空间有限的ITC是生产高质量的单晶MAPbCl3膜的有效方法.
- 低缺陷密度有助于提高光伏性能.
- MAPbCl3证明了太阳能转化和X射线检测的潜力.
更多相关视频
08:12Low Pressure Vapor-assisted Solution Process for Tunable Band Gap Pinhole-free Methylammonium Lead Halide Perovskite Films
Published on: September 8, 2017
9.7K
10:19Solution-Processed "Silver-Bismuth-Iodine" Ternary Thin Films for Lead-Free Photovoltaic Absorbers
Published on: September 27, 2018
9.8K
相关概念视频
X-ray Crystallography
The size of the unit cell and the arrangement of atoms in a crystal may be determined from measurements of the diffraction of X-rays by the crystal, termed X-ray crystallography.
Diffraction
Diffraction is the change in the direction of travel experienced by an electromagnetic wave when it encounters a physical barrier whose dimensions are comparable to those of the wavelength of the light. X-rays are electromagnetic radiation with wavelengths about as long as the distance between neighboring...
Diffraction
Diffraction is the change in the direction of travel experienced by an electromagnetic wave when it encounters a physical barrier whose dimensions are comparable to those of the wavelength of the light. X-rays are electromagnetic radiation with wavelengths about as long as the distance between neighboring...
Valence Bond Theory
Coordination compounds and complexes exhibit different colors, geometries, and magnetic behavior, depending on the metal atom/ion and ligands from which they are composed. In an attempt to explain the bonding and structure of coordination complexes, Linus Pauling proposed the valence bond theory, or VBT, using the concepts of hybridization and the overlapping of the atomic orbitals. According to VBT, the central metal atom or ion (Lewis acid) hybridizes to provide empty orbitals of suitable...
Crystal Field Theory - Octahedral Complexes
Crystal Field Theory
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
To explain the observed behavior of transition metal complexes (such as colors), a model involving electrostatic interactions between the electrons from the ligands and the electrons in the unhybridized d orbitals of the central metal atom has been developed. This electrostatic model is crystal field theory (CFT). It helps to understand, interpret, and predict the colors, magnetic behavior, and some structures of coordination compounds of transition metals.
CFT focuses on...
Colors and Magnetism
Color in Coordination Complexes
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human eye.
When atoms or molecules absorb light at the proper frequency, their electrons are excited to higher-energy orbitals. For many main group atoms and molecules, the absorbed photons are in the ultraviolet range of the electromagnetic spectrum, which cannot be detected by the human eye. For coordination compounds, the energy difference between the d orbitals often allows photons in the visible range to be absorbed and emitted, which is seen as colors by the human eye.
Determination of Crystal Structures
In the late 1800s, the revelation that light extended beyond visible wavelengths led to the discovery of X-rays by Wilhelm Roentgen. Recognized as high-energy electromagnetic radiation with short wavelengths, X-rays prompted exploration into their interaction with crystals. Max von Laue proposed in 1912 that the periodic arrangement of atoms, ions, or molecules in crystals would cause them to diffract X-rays, a hypothesis confirmed through experiments with copper sulfate and zinc sulfide...
