scholarly journals Large negative thermo-optic coefficients of a lead halide perovskite

2019 ◽  
Vol 5 (7) ◽  
pp. eaax0786 ◽  
Author(s):  
Taketo Handa ◽  
Hirokazu Tahara ◽  
Tomoko Aharen ◽  
Yoshihiko Kanemitsu
Keyword(s):  
Refractive Index ◽  
High Performance ◽  
Refractive Index Change ◽  
Photonic Devices ◽  
Thermally Induced ◽  
Inorganic Semiconductors ◽  
Halide Perovskite ◽  
And Performance ◽  
Increasing Temperature ◽  
Lead Halide

Lead halide perovskites are promising semiconductors for high-performance photonic devices. Because the refractive index determines the optimal design and performance limit of the semiconductor devices, the refractive index and its change upon external modulations are the most critical properties for advanced photonic applications. Here, we report that the refractive index of halide perovskite CH3NH3PbCl3 shows a distinct decrease with increasing temperature, i.e., a large negative thermo-optic coefficient, which is opposite to those of conventional inorganic semiconductors. By using this negative coefficient, we demonstrate the compensation of thermally induced optical phase shifts occurring in conventional semiconductors. Furthermore, we observe a large and slow refractive index change in CH3NH3PbCl3 during photoirradiation and clarify its origin to be a very low thermal conductivity supported by theoretical analysis. The giant thermo-optic response of CH3NH3PbCl3 facilitates efficient phase modulation of visible light.

scholarly journals Controlled Growth of Monocrystalline Organo‐Lead Halide Perovskite and Its Application in Photonic Devices

2017 ◽  
Vol 56 (41) ◽  
pp. 12486-12491 ◽  
Author(s):  
Wenxin Mao ◽  
Jialu Zheng ◽  
Yupeng Zhang ◽  
Anthony S. R. Chesman ◽  
Qingdong Ou ◽  
...  
Keyword(s):  
Photonic Devices ◽  
Controlled Growth ◽  
Halide Perovskite ◽  
Lead Halide

scholarly journals Cover Picture: Controlled Growth of Monocrystalline Organo‐Lead Halide Perovskite and Its Application in Photonic Devices (Angew. Chem. Int. Ed. 41/2017)

2017 ◽  
Vol 56 (41) ◽  
pp. 12375-12375
Author(s):  
Wenxin Mao ◽  
Jialu Zheng ◽  
Yupeng Zhang ◽  
Anthony S. R. Chesman ◽  
Qingdong Ou ◽  
...  
Keyword(s):  
Photonic Devices ◽  
Controlled Growth ◽  
Halide Perovskite ◽  
Lead Halide

Understanding the Essential Role of PbI2 Films in a High-Performance Lead Halide Perovskite Photodetector

2020 ◽  
Vol 124 (28) ◽  
pp. 15107-15114
Author(s):  
Yang Li ◽  
Kai Cui ◽  
Xuehui Xu ◽  
Jie Chen ◽  
Yang Liu ◽  
...  
Keyword(s):  
High Performance ◽  
Essential Role ◽  
Halide Perovskite ◽  
Lead Halide

An all-inorganic lead halide perovskite-based photocathode for stable water reduction

2018 ◽  
Vol 54 (81) ◽  
pp. 11459-11462 ◽  
Author(s):  
Lin-Feng Gao ◽  
Wen-Jun Luo ◽  
Ying-Fang Yao ◽  
Zhi-Gang Zou
Keyword(s):  
High Performance ◽  
Water Reduction ◽  
Inorganic Lead ◽  
Halide Perovskite ◽  
Lead Halide

An all-inorganic lead halide perovskite-based photocathode was prepared for high-performance and stable water reduction to generate hydrogen.

OPTICAL NONLINEARITY OF A TRIPHENYLMETHANE DYE AS STUDIED BY Z-SCAN AND SELF-DIFFRACTION TECHNIQUES

2006 ◽  
Vol 20 (15) ◽  
pp. 887-897 ◽  
Author(s):  
R. MADHANA SUNDARI ◽  
P. K. PALANISAMY
Keyword(s):  
Thin Films ◽  
Refractive Index ◽  
Refractive Index Change ◽  
Optical Nonlinearity ◽  
Organic Dye ◽  
The Self ◽  
Index Change ◽  
Thermally Induced ◽  
Dye Sensitized ◽  
Phase Differences

The optical nonlinearity of an organic dye from a triphenylmethane group is measured using the Z-scan technique. The sample under study is found to exhibit the negative nature of nonlinearity, which is mainly due to the thermally induced refractive index change. Since this thermally induced refractive index change can lead to self-diffraction, the self-diffraction properties of the sample is studied by using thin films of a dye-sensitized gelatin. A He-Ne laser (633 nm) is used for both the Z-scan and self-diffraction studies. In the self-diffraction studies, it is also found that the different diffracted orders exhibit varying phase differences.

Solvothermal synthesis of cesium lead halide perovskite nanowires with ultra-high aspect ratios for high-performance photodetectors

Nanoscale ◽  
2018 ◽  
Vol 10 (45) ◽  
pp. 21451-21458 ◽  
Author(s):  
Wei Zhai ◽  
Jing Lin ◽  
Chun Li ◽  
Shouming Hu ◽  
Yang Huang ◽  
...  
Keyword(s):  
Solvothermal Synthesis ◽  
High Performance ◽  
Optoelectronic Properties ◽  
Inorganic Perovskite ◽  
One Dimensional ◽  
Aspect Ratios ◽  
Halide Perovskite ◽  
Lead Halide

One-dimensional (1D) inorganic perovskite nanowires (NWs) have attracted promising attention for application in the fields of photodetection, lasers and lighting due to their outstanding optoelectronic properties.

scholarly journals Managing Phase Purities and Crystal Orientation for High‐Performance and Photostable Cesium Lead Halide Perovskite Solar Cells

Solar RRL ◽  
2020 ◽  
Vol 4 (9) ◽  
pp. 2000213 ◽  
Author(s):  
Qiong Wang ◽  
Joel A. Smith ◽  
Dieter Skroblin ◽  
Julian A. Steele ◽  
Christian M. Wolff ◽  
...  
Keyword(s):  
Solar Cells ◽  
Crystal Orientation ◽  
High Performance ◽  
Perovskite Solar Cells ◽  
Halide Perovskite ◽  
Lead Halide

scholarly journals Bidirectional Angle-Tolerant Polarization-Tuned Filtering and Wide-Range Refractive Index Sensing Based on Metal Film Coated Nanograting

Nanomaterials ◽  
2020 ◽  
Vol 11 (1) ◽  
pp. 47
Author(s):  
Wenli Cui ◽  
Qiannan Wu ◽  
Bo Chen ◽  
Xufeng Li ◽  
Xiaolin Luo ◽  
...  
Keyword(s):  
Refractive Index ◽  
Metal Film ◽  
High Performance ◽  
Incident Angle ◽  
Single Layer ◽  
Transverse Magnetic ◽  
Photonic Devices ◽  
Biomedical Sensors ◽  
Dual Channel ◽  
Wide Range

The miniaturization and integration of photonic devices are new requirements in the fast-growing optics field. In this paper, we focus on a feature-rich sub-wavelength nanograting-coated single-layer metal film. The numerical results show that the reflection behaviors of this proposed structure can realize bidirectional dual-channel ultra-narrowband polarized filtering and bidirectional wavelength-modulated sensing in a wide refractive index (RI) range from 1.0 to 1.4 for incident angle of 10° with transverse-magnetic (TM) polarized illumination at wavelengths between 550 nm to 1500 nm. Moreover, the bidirectional properties of filtering and sensing are not obviously decreased when increasing incident angle from 10° to 30°, and decreasing incident angle from 10° to 0°. The calculated RI sensitivity can be up to 592 nm/RIU with a high figure of merit (FOM) of 179.4 RIU−1. More to the point, this nanograting has a simple structure and is less sensitive to the height and shape of grating ridge, which provides great convenience for the fabrication of devices. The other thing that is going on is that this structure can also realize synchronously tunable color filtering, including green to red, with high color purity in the visible band by choosing the period. The underlying physical mechanism is analyzed in detail, and is primarily attributed to surface plasmon polariton (SPP) resonance and dipole resonance at double plasmon resonance wavelengths. This work has tremendous potential in developing multipurpose and high-performance integrated optical devices such as spectral filters, colored displays and plasmon biomedical sensors.

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