Study on a Novel Selective Solar Absorber With Surface Ultrathin Metal Film

2016 ◽  
Author(s):  
Xing Fang ◽  
C. Y. Zhao ◽  
Hua Bao
Keyword(s):  
Thin Film ◽  
Genetic Algorithm ◽  
Refractive Index ◽  
Conversion Efficiency ◽  
Metal Film ◽  
High Performance ◽  
Total Conversion ◽  
Solar Absorber ◽  
Solar Absorbers ◽  
Silica Layers

In this paper, simple selective solar absorbers with three layers are investigated, and their selective absorptivity spectra are quite appropriate for high performance solar absorbers. The simple solar absorber contains top ultrathin tungsten (W) layer, middle silica layers and W substrate. The thickness of silica can determine the location of absorptivity peak while the thickness of top W layer affects the intensity of absorptivity. Considering the total conversion efficiency, optimized thicknesses in solar absorbers are determined by genetic algorithm. This optimized thin film solar absorber keeps high absorptivities when incident direction varies from 0 degree to 60 degree in both TE and TM polarizations. Experiments validate the effectivity of thin film solar absorbers, and the deviation from simulations comes from increscent refractive index and surface non-uniform.

Effects of One-Dimensional Photonic Crystal on Thin Film Silicon Solar Cells

2013 ◽  
Vol 827 ◽  
pp. 49-53 ◽  
Author(s):  
Qi Wang ◽  
Hai Na Mo ◽  
Zi Qiao Lou ◽  
Ke Meng Yang ◽  
Yue Sun ◽  
...  
Keyword(s):  
Thin Film ◽  
Refractive Index ◽  
Solar Cells ◽  
Photonic Crystal ◽  
Energy Conversion ◽  
Conversion Efficiency ◽  
Energy Conversion Efficiency ◽  
One Dimensional ◽  
Si Solar Cells ◽  
Refractive Index Difference

We have designed lateral contact thin film silicon-based solar cells with and without one-dimensional photonic crystals as back surface field layer. The photonic crystal comprises a distributed Bragg reflector (DBR) for trapping the light. Simulations demonstrate that energy conversion efficiency and short circuit current ISCfor c-Si solar cells with the photonic crystal structure are increased to 21.11% and 27.0 mA, respectively, from 18.33% and 22.8mA of the one without photonic crystal. In addition, the effects of DBRs consisting of different materials are investigated in our simulations. When the refractive index difference between sub-layers of the DBR is larger, the forbidden band width is broader, the reflectance of the DBR is higher, and more photons are reflected and trapped into the active region, then the absorption efficiency and the energy conversion efficiency of the solar cell are both increased. The bigger the refractive index difference of the DBRs sub-layers is, the broader the forbidden band width is. In addition, a-Si solar cells with and without DBR are also discussed.

scholarly journals An Ultra-High Temperature Stable Solar Absorber Using the ZrC-Based Cermets

2021 ◽  
Vol 9 ◽  
Author(s):  
Jian Wang ◽  
Zuoxu Wu ◽  
Yijie Liu ◽  
Shuaihang Hou ◽  
Zhikun Ren ◽  
...  
Keyword(s):  
High Temperature ◽  
Conversion Efficiency ◽  
Steel Substrate ◽  
Selective Absorption ◽  
Solar Absorptance ◽  
Excellent Thermal Stability ◽  
Solar Absorber ◽  
Solar Absorbers ◽  
Stable Operating ◽  
Ultra High Temperature

Exploring the spectrally selective absorbers with high optical performance and excellent thermal stability is crucial to improve the conversion efficiency of solar energy to electricity in concentrated solar power (CSP) systems. However, there are limited reports on the selective solar absorbers utilized at 900oC or above. Herein, we developed a selective absorption coating based on the ultra-high temperature ceramic ZrC and the quasi-optical microcavity (QOM) optical structure, and experimentally achieved the absorber via depositing an all-ceramic multilayer films on a stainless steel substrate by magnetron sputtering. The prepared multi-layer selective absorber demonstrates an excellent high solar absorptance of ∼0.964 due to the multi absorptance mechanisms in the QOM, and a relatively low thermal emittance of ∼0.16 (82°C). Moreover, the coating can survive at 900oC in vacuum for 100 h with a superior spectral selectivity of 0.96/0.143 (82°C) upon annealing, resulting from the introduction of ultra-high temperature ceramic ZrC in the QOM structure. Under the conditions of a stable operating temperature of 900°C and a concentration ratio of 1,000 suns, the calculated ideal conversion efficiency using this absorber can reach around 68%, exceeding most solar selective absorbers in previous reports.

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.

Numerical Simulation of Nc-Silicon PIN Solar Cells with AMPS-1D

2013 ◽  
Vol 712-715 ◽  
pp. 309-312 ◽  
Author(s):  
Ming Kun Xu
Keyword(s):  
Thin Film ◽  
Numerical Simulation ◽  
Solar Cells ◽  
Solar Cell ◽  
Conversion Efficiency ◽  
Thin Film Solar Cell ◽  
High Performance ◽  
Fill Factor ◽  
High Efficiency ◽  
Program Package

P+a-SiC/ I nc-Si/N+a-Si structure solar cells is simulated by AMPS-1D program package to characterize the new thin film solar cell. In order to analyze the characteristics of the device, the thickness of layer are considered. The results show that the thickness of layer and the value of layer have a great effect on the conversion efficiency. Our results suggest a high performance P a-SiC/ I nc-Si/N a-Si structure solar cells with high efficiency of 14.411% and fill factor of 0.738. The simulation result is potentially valuable in exploring gradual bandgap P+a-SiC/I nc-Si/N+a-Si structure solar cells with high performance.

scholarly journals Bidirectional interconversion of microwave and light with thin-film lithium niobate

2021 ◽  
Author(s):  
Yuntao Xu ◽  
Ayed Sayem ◽  
Linran Fan ◽  
Chang-Ling Zou ◽  
Sihao Wang ◽  
...  
Keyword(s):  
Thin Film ◽  
Lithium Niobate ◽  
Conversion Efficiency ◽  
High Performance ◽  
Photorefractive Effect ◽  
Optical Cavity ◽  
Long Distance ◽  
Superconducting Circuits ◽  
Network Applications ◽  
Electro Optic

Abstract Superconducting cavity electro-optics presents a promising route to coherently convert microwave and optical photons and distribute quantum entanglement between superconducting circuits over long-distance. Strong Pockels nonlinearity and high-performance optical cavity are the prerequisites for high conversion efficiency. Thin-film lithium niobate (TFLN) offers these desired characteristics. Despite significant recent progresses, only unidirectional conversion with efficiencies orders of magnitude lower than expected has been realized. In this article, we demonstrate the first bidirectional electro-optic conversion in TFLN-superconductor hybrid system, with conversion efficiency improved by more than three orders of magnitude. Our new air-clad device architecture boosts the sustainable intracavity pump power at cryogenic temperatures by suppressing the prominent photorefractive effect that limits cryogenic performance of TFLN, and reaches an efficiency of 1.02% (internal efficiency of 15.2%). This work firmly establishes the TFLN-superconductor hybrid EO system as a highly competitive transduction platform for future quantum network applications.

scholarly journals Flexible and efficient perovskite quantum dot solar cells via hybrid interfacial architecture

2020 ◽  
Author(s):  
Long Hu ◽  
Qian Zhao ◽  
Shujuan Huang ◽  
Jianghui Zheng ◽  
Xinwei Guan ◽  
...  
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Solar Cell ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
High Performance ◽  
Mechanical Stability ◽  
Power Conversion ◽  
Transport Layer ◽  
Electron Transport Layer

Abstract All-inorganic CsPbI3 perovskite quantum dots (QDs) have received intense research interest for photovoltaic applications because of the recently demonstrated higher power conversion efficiency compared to solar cells using other QD materials. These QD devices also exhibit good mechanical stability amongst various thin-film photovoltaic technologies. In this work, through developing a hybrid interfacial architecture consisting of CsPbI3 QD/PCBM heterojunctions, we report the formation of an energy cascade for efficient charge transfer at both QD heterointerfaces and QD/electron transport layer interfaces. The champion CsPbI3 QD solar cell has a best power conversion efficiency of 15.1%, which is among the highest report to date. Building on this strategy, we demonstrate the very first perovskite QD flexible solar cell with a record efficiency of 12.3%. A detailed morphological characterization reveals that the perovskite QD film can better retain structure integrity than perovskite bulk thin-film under external mechanical stress. This work is the first to demonstrate higher mechanical endurance of QD film compared to bulk thin-film, and highlights the importance of further research on high‐performance and flexible optoelectronic devices using solution-processed QDs.

Physical Vapor Deposition Synthesis of Cu3BiS3 for Application in Thin Film Photovoltaics

2005 ◽  
Vol 865 ◽  
Author(s):  
Nathan J. Gerein ◽  
Joel A. Haber
Keyword(s):  
Thin Film ◽  
Vapor Deposition ◽  
Physical Vapor Deposition ◽  
Cost Effective ◽  
Photovoltaic Devices ◽  
Novel Device ◽  
Solar Absorber ◽  
Solar Absorbers ◽  
Thin Film Photovoltaics ◽  
Combinatorial Methods

AbstractThe development of novel solar absorbers and device configurations that incorporate only materials which are cost effective, abundant, and non-toxic may be required for widespread deployment of photovoltaics. Cu3BiS3 (Eg=1.2 eV) has been previously reported to be a suitable solar absorber for use in thin film photovoltaic devices. We have developed a physical vapor deposition synthesis for Cu3BiS3, and will employ combinatorial methods to identify novel device configurations in an effort to produce a device exhibiting sufficient efficiency to capture the interest of the photovoltaics community.

scholarly journals Bidirectional interconversion of microwave and light with thin-film lithium niobate

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Yuntao Xu ◽  
Ayed Al Sayem ◽  
Linran Fan ◽  
Chang-Ling Zou ◽  
Sihao Wang ◽  
...  
Keyword(s):  
Thin Film ◽  
Lithium Niobate ◽  
Conversion Efficiency ◽  
High Performance ◽  
Photorefractive Effect ◽  
Optical Cavity ◽  
Long Distance ◽  
Superconducting Circuits ◽  
Network Applications ◽  
Electro Optic

AbstractSuperconducting cavity electro-optics presents a promising route to coherently convert microwave and optical photons and distribute quantum entanglement between superconducting circuits over long-distance. Strong Pockels nonlinearity and high-performance optical cavity are the prerequisites for high conversion efficiency. Thin-film lithium niobate (TFLN) offers these desired characteristics. Despite significant recent progresses, only unidirectional conversion with efficiencies on the order of 10−5 has been realized. In this article, we demonstrate the bidirectional electro-optic conversion in TFLN-superconductor hybrid system, with conversion efficiency improved by more than three orders of magnitude. Our air-clad device architecture boosts the sustainable intracavity pump power at cryogenic temperatures by suppressing the prominent photorefractive effect that limits cryogenic performance of TFLN, and reaches an efficiency of 1.02% (internal efficiency of 15.2%). This work firmly establishes the TFLN-superconductor hybrid EO system as a highly competitive transduction platform for future quantum network applications.

Conjugated molecule based 2D perovskites for high-performance perovskite solar cells

2021 ◽  
Vol 9 (38) ◽  
pp. 21910-21917
Author(s):  
Tao Zhu ◽  
Lening Shen ◽  
Hanlin Chen ◽  
Yongrui Yang ◽  
Luyao Zheng ◽  
...  
Keyword(s):  
Thin Film ◽  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
High Performance ◽  
Power Conversion ◽  
Perovskite Solar Cells ◽  
Conjugated Molecules ◽  
Conjugated Molecule

Perovskite solar cells formed from a 2D/3D bilayer perovskite thin film, where 2D perovskites were created by novel conjugated molecules, exhibited a power conversion efficiency of 21.98% and a dramatically boosted stability was demonstrated.

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