scholarly journals Terahertz Wave Absorption Property of all Mixed Organic–Inorganic Hybrid Perovskite Thin Film MA(Sn, Pb)(Br, I)3 Fabricated by Sequential Vacuum Evaporation Method

2021 ◽  
Vol 9 ◽  
Author(s):  
Inhee Maeng ◽  
Hiroshi Tanaka ◽  
Valynn Katrine Mag-usara ◽  
Makoto Nakajima ◽  
Masakazu Nakamura ◽  
...  
Keyword(s):  
Thin Film ◽  
Terahertz Wave ◽  
Vacuum Evaporation ◽  
Absorption Property ◽  
Absorption Frequency ◽  
Inorganic Hybrid ◽  
Evaporation Method ◽  
Post Annealing ◽  
Hybrid Perovskite ◽  
Terahertz Absorption

All mixed hybrid perovskite (MA(Sn, Pb)(Br,I)3) thin film was fabricated by sequential vacuum evaporation method. To optimize the first layer with PbBr2 and SnI2, we performed different annealing treatments. Further, MA(Sn, Pb)(Br, I)3 thin film was synthesized on the optimized first layer by evaporating MAI and post-annealing. The formed hybrid perovskite thin film exhibited absorptions at 1.0 and 1.7 THz with small absorbance (<10%). Moreover, no chemical and structural defect-incorporated absorption was found. In this study, the possibility of changing terahertz absorption frequency through the mixture of metal cations (Sn+ and Pb+) and halogen anions (Br− and I−) was verified.

Significant THz-wave absorption property in mixed δ- and α-FAPbI3 hybrid perovskite flexible thin film formed by sequential vacuum evaporation

2019 ◽  
Vol 12 (5) ◽  
pp. 051003 ◽  
Author(s):  
Young Mi Lee ◽  
Jung-Ho Yun ◽  
Asuka Matsuyama ◽  
Sora Kobori ◽  
Inhee Maeng ◽  
...  
Keyword(s):  
Thin Film ◽  
Vacuum Evaporation ◽  
Absorption Property ◽  
Wave Absorption ◽  
Thz Wave ◽  
Hybrid Perovskite

scholarly journals Strong Linear Correlation between CH3NH2 Molecular Defect and THz-Wave Absorption in CH3NH3PbI3 Hybrid Perovskite Thin Film

Nanomaterials ◽  
2020 ◽  
Vol 10 (4) ◽  
pp. 721 ◽  
Author(s):  
Inhee Maeng ◽  
Asuka Matsuyama ◽  
Jung-Ho Yun ◽  
Shenghao Wang ◽  
Chul Kang ◽  
...  
Keyword(s):  
Thin Film ◽  
Linear Correlation ◽  
Defect Density ◽  
Molecular Defect ◽  
Absorption Property ◽  
Wave Absorption ◽  
Thz Wave ◽  
Post Annealing ◽  
Hybrid Perovskite ◽  
Strong Linear Correlation

To control the density of a CH3NH2 molecular defect, which strongly contributed to a significant THz-wave absorption property in the CH3NH3PbI3 hybrid perovskite thin film formed by the sequential vacuum evaporation method, we performed post-annealing processes with various temperatures and times. In the thin film after post-annealing at 110 °C for 45 min, the density of the CH3NH2 molecular defect was minimized, and CH3NH3I and PbI2 disappeared in the thin film after the post-annealing process at 150 °C for 30 min. However, the density of the CH3NH2 molecular defect increased. Moreover, the THz-wave absorption property for each thin film was obtained using a THz time-domain spectroscopy to understand the correlation between the density of a molecular defect and the THz-wave oscillation strength at 1.6 THz, which originated in the molecular defect-incorporated hybrid perovskite structure. There is a strong linear correlation between the oscillator strength of a significant THz-wave absorption at 1.6 THz and the CH3NH2 molecular defect density.

Improving the crystal growth of a Cs0.24FA0.76PbI3−xBrx perovskite in a vapor–solid reaction process using strontium iodide

2020 ◽  
Vol 4 (5) ◽  
pp. 2491-2496
Author(s):  
Xi Deng ◽  
Jingchen Hua ◽  
Fuzhi Huang ◽  
Yong Peng ◽  
Wangnan Li ◽  
...  
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Crystal Growth ◽  
Perovskite Solar Cells ◽  
Thin Film Deposition ◽  
Film Deposition ◽  
Reaction Process ◽  
Solid Reaction ◽  
Inorganic Hybrid ◽  
Hybrid Perovskite

Preparing organic–inorganic hybrid perovskite films by deploying vacuum-based methods, which are widely used for industrial thin-film deposition, is expected to promote the commercialization of perovskite solar cells.

Fabrication of novel CuAgZnSnSe4–Cu2ZnSnSe4 thin film solar cells by the vacuum evaporation method

2020 ◽  
Vol 44 (35) ◽  
pp. 15270-15280
Author(s):  
Johnson Henry ◽  
Kannusamy Mohanraj ◽  
Ganesan Sivakumar
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Vacuum Evaporation ◽  
Thin Film Solar Cells ◽  
Evaporation Method ◽  
Heterojunction Solar Cells

The heterojunction solar cells based on the glass/X/CAZTSe/CZTSe/Ag structure (X = Al, Cu, Ag, FTO, and AZO) were fabricated by the vacuum evaporation method. The heterojunction solar cells showed poor efficiency.

scholarly journals Unusual terahertz-wave absorptions in δ/α-mixed-phase FAPbI3 single crystals: interfacial phonon vibration modes

2021 ◽  
Vol 13 (1) ◽  
Author(s):  
Inhee Maeng ◽  
Seungjun Lee ◽  
E. Q. Han ◽  
Yurou Zhang ◽  
Seung Jae Oh ◽  
...  
Keyword(s):  
Single Crystals ◽  
Terahertz Wave ◽  
Mixed Phase ◽  
Vibration Modes ◽  
Phonon Modes ◽  
Inorganic Hybrid ◽  
Wave Absorption ◽  
Thz Wave ◽  
Hybrid Perovskite ◽  
Chemical States

AbstractThe terahertz (THz)-wave absorption properties in organic-inorganic hybrid perovskite (OHP) materials are investigated with the in-depth development of OHP-based THz applications. In the THz range from 0.5 to 3 THz, OHPs typically show several interesting phonon modes such as transverse, longitudinal, and halogen self-vibrations. To modulate these frequencies, the density changes in defect-incorporated structures and element mixtures were tested and confirmed. In the literature, the origin of phonon modes in OHP materials have been mostly explained. However, we found new phonon vibration modes in formamidinium (FA)-based hybrid perovskite structures. FAPbI3 single crystals, organic–inorganic hybrid perovskites, of the δ-, δ/α-mixed-, and α-phases were prepared. We intriguingly found that the δ/α-mixed-phase exhibited significant THz-wave absorption peaks at 2.0 and 2.2 THz that were not related to any phonon modes from either the δ- or α-phases, although the δ/α-mixed-phase sample was confirmed to be formed by a physical combination of the δ- and α-phases without the creation of any new chemical states. Our theoretical study performed with ab initio calculations provides an explanation for these unusual THz-wave absorption behaviors; they originate from the novel vibration modes excited at the seamless interfaces in the mixed phase of FAPbI3.

Gas-Induced Confinement–Deconfinement Interplay in Organic–Inorganic Hybrid Perovskite Thin Film Results in Systematic Band Modulation

2019 ◽  
Vol 11 (46) ◽  
pp. 43708-43718 ◽  
Author(s):  
Sayantan Sasmal ◽  
Shilendra Kumar Sharma ◽  
Soumyo Chatterjee ◽  
Amlan J. Pal ◽  
Shuvan Prashant Turaga ◽  
...  
Keyword(s):  
Thin Film ◽  
Inorganic Hybrid ◽  
Hybrid Perovskite

High-performance organic–inorganic hybrid perovskite thin-film field-effect transistors

2018 ◽  
Vol 124 (9) ◽  
Author(s):  
Linlin Tang ◽  
Yuze Peng ◽  
Zhou Zhou ◽  
Yuxiang Wu ◽  
Jian Xu ◽  
...  
Keyword(s):  
Thin Film ◽  
Field Effect ◽  
High Performance ◽  
Field Effect Transistors ◽  
Inorganic Hybrid ◽  
Hybrid Perovskite
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