The morphology of heterojunction is characterized by optical microscopy (Olympus BX 51). To verify the molecular vibration modes and the optical band gaps of the applied 2D materials, a confocal Raman spectroscope (WItec alpha 300) is used to measure the Raman spectra and PL spectra at room temperature.
With the conduction band minimum (CBM) and valence band maximum (VBM) of the heterojunction localize in different layers, such typical type II heterojunctions opens a tunable degree of freedom to engineering interlayer optical transition in the IR regime beyond the limit of the intrinsic optical band gap of the constituent material 24.
The input illumination is reflected by the mirror and focused by the objective lens on the target surface. Then, the light can be reflected by the target. The 2D heterojunction device plays the role of “eye” to collect light information reflected by the target object through this optical system.
The operational principle of a computational spectrometer based on a single tunable device exploits the electrical tunability of the photodetector (6, 7), e.g., via voltage bias, for collecting the output photocurrent within a high-dimensional vector space defined by the number of variable input conditions.
Two-terminal model of the heterostructure device is built with 6.86 nm ML 2 × 2 WSe 2 −1 × 1 ML ReS 2 as channel and the doped ML WSe 2 -ML ReS 2 as electrodes. A vacuum space at least 16 Å is set perpendicular to the surface of the device to avoid the spurious interaction between periodic unit.
The InSe-GeSe heterojunction device was illuminated by seven different light sources, with each source being power-modulated at 10 different intensities (Fig. 3, A and B) while covering the spectral range of 400 to 1100 nm, and the resulting voltage-dependent photocurrents recorded, as shown in Fig. 3 (C and D).
Characterization of thin-film structures of silicon heterojunction ...
In this work, we explore reflectance spectrophotometry as a fast, inline-compatible quality-assurance method to extract thin-film layer thicknesses on silicon heterojunction (SHJ) solar cell precursors. We develop an optical model based on the transfer-matrix method (TMM) and so-called rigorous polarization ray-tracing technique for ...
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Cell Reports Physical Science
In this study, using a hybrid heterojunction combining the transparent inorganic semiconductor copper thiocyanate (CuSCN) with organic semiconductors (C 70, PC 70 BM, C 60, ITIC, IT-4F, or Y6), we show that simple color-tunable solar cells can be fabricated in which the transmission spectrum is determined solely by choice of the ...
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Characterization of a Heterojunction Silicon Solar Cell by Means …
This study investigates the dark and light electrophysical characteristics of a heterojunction silicon solar cell fabricated using plasma-enhanced chemical vapor deposition. The measurements are performed at various applied biases, enabling the determination of complex resistance, characteristic time, capacitive response and impurity ...
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(PDF) Graphene-Based Electrodes for Silicon Heterojunction Solar Cell ...
spectrophotometer. Lastly, ... [17,19,22,23], in thin film solar cells with an amorphous slicon P-I-N structure and in silicon heterojunction solar cells (SHJ) [24][25][26] [27]. Our previous ...
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Large-area and high-efficiency carbon nanotube/silicon heterojunction …
In CNT/Si heterojunction solar cells, the CNT film acts as both p-type layer and transparent electrode. Thus, tailoring the optical-electrical characteristic of CNT films is crucial for obtaining high-efficiency photovoltaic devices, especially towards scaling up to large-area CNT/Si solar cells. In the past decades, great efforts have been devoted to achieving high …
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Nonlinear self-calibrated spectrometer with single GeSe-InSe
Here, we train an artificial neural network to recover the full nonlinear spectral photoresponse of a single GeSe-InSe p-n heterojunction device. The device has a spectral range of 400 to 1100 nm, a small footprint of ~25 × 25 square micrometers, and a mean reconstruction error of 2 × 10 −4 for the power spectrum at 0.35 nanometers.
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Fabrication, electrical performance analysis and photovoltaic ...
We successfully fabricated a β-H 2 Pc/p-Si heterojunction at room temperature using a conventional high-vacuum thermal evaporation method, offering a practical approach for integrating these materials into electronic devices.
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Nanocrystalline‐silicon hole contact layers enabling efficiency ...
In this work, we propose a route to achieve a certified efficiency of up to 24.51% for silicon heterojunction (SHJ) solar cell on a full-size n-type M2 monocrystalline-silicon Cz wafer (total area ...
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Enhanced performance of Si/PEDOT: PSS heterojunction solar cells …
Heterojunction solar cells based on n-type silicon (n-Si) and p-type conjugated polymer are the promising device for photovoltaic industry own to potentially excellent conversion efficiency and economic manufacturing process [[1], [2], [3]].Poly(3,4-ethylenedioxy-thiophene):poly(styrene-sulfonate) (PEDOT:PSS), as a p-type conductive conjugated polymer, …
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Monolayer MoS2 Heterojunction Solar Cells
We realized photovoltaic operation in large-scale MoS2 monolayers by the formation of a type-II heterojunction with p-Si. The MoS2 monolayer introduces a built-in electric field near the interface ...
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Fabrication, electrical performance analysis and photovoltaic ...
We successfully fabricated a β-H 2 Pc/p-Si heterojunction at room temperature using a conventional high-vacuum thermal evaporation method, offering a practical approach …
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Electrically tunable two-dimensional heterojunctions for ...
Here, we report a design of a micron-sized near-infrared ultra-miniaturized spectrometer based on two-dimensional van der Waals heterostructure (2D-vdWH). By introducing heavy metal atoms with ...
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A spectrally selective self-powered photodetector utilizing a …
Most heterojunction photodetectors (PDs) can detect single-band, dual-band, or even multi-band light. However, the ability to adjust the spectral response band of the PD remains a challenge. This study presents a self-powered PD based on a ZnO/Cu 2 O heterojunction that overcomes this limitation.
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Characterization of thin-film structures of silicon heterojunction ...
In this work, we explore reflectance spectrophotometry as a fast, inline-compatible quality-assurance method to extract thin-film layer thicknesses on silicon …
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Fabrication of CdTe/Si heterojunction solar cell
Spectrophotometer. Photoluminescence study is done in the range of 200–900 nm using Perkin Elmer LS-55 PL spectrometer. The photovoltaic devices in this study comprises of a heterojunction layer of n-CdTe/p-Si(100). p-Si wafer is cleaned using standard RCA process followed by etching in 1 % dilute hydrofluoric acid (HF) solution to
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Bilayer heterojunction solar cell based on naphthalene bis ...
For heterojunction solar cell, the breakthrough was led by Tang in 1986 for the combination of copper phthalocyanine and perylenetetracaboxylicacid bis-benzimidazole into a p–n heterojunction [3]. The donor–acceptor nature of the heterointerface in single heterojunction is shown to be crucial in determining the photovoltaic properties of solar cell. Energy level …
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Characterization of a Heterojunction Silicon Solar Cell by Means of ...
This study investigates the dark and light electrophysical characteristics of a heterojunction silicon solar cell fabricated using plasma-enhanced chemical vapor deposition. …
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Room-Temperature Self-Powered Infrared …
Room-temperature operation, micrometer-scale size, and silicon-compatible technology make the BP/MoS 2 heterojunction a promising configuration for portable spectrometer applications.
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Electrically tunable two-dimensional heterojunctions for ...
Here, we report a design of a micron-sized near-infrared ultra-miniaturized spectrometer based on two-dimensional van der Waals heterostructure (2D-vdWH). By …
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Room-Temperature Self-Powered Infrared Spectrometer Based …
Room-temperature operation, micrometer-scale size, and silicon-compatible technology make the BP/MoS 2 heterojunction a promising configuration for portable spectrometer applications.
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Fabrication and characterization of amorphous ITO/p-Si heterojunction …
Amorphous indium-tin-oxide (a-ITO) film was deposited by radio-frequency (RF) magnetron sputtering at 180°C substrate temperature on the texturized p-Si wafer to fabricate a-ITO/p-Si heterojunction solar cell. The microstructural, optical and electrical properties of the a -ITO film were characterized by XRD, SEM, XPS, UV-VIS ...
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Fabrication and characterization of amorphous ITO/p-Si …
Amorphous indium-tin-oxide (a-ITO) film was deposited by radio-frequency (RF) magnetron sputtering at 180°C substrate temperature on the texturized p-Si wafer to fabricate …
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Strategies for realizing high-efficiency silicon heterojunction solar cells
Silicon heterojunction (SHJ) solar cells have achieved a record efficiency of 26.81% in a front/back-contacted (FBC) configuration. Moreover, thanks to their advantageous high V OC and good infrared response, SHJ solar cells can be further combined with wide bandgap perovskite cells forming tandem devices to enable efficiencies well above 33%. In …
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Nonlinear self-calibrated spectrometer with single …
Here, we train an artificial neural network to recover the full nonlinear spectral photoresponse of a single GeSe-InSe p-n heterojunction device. The device has a spectral range of 400 to 1100 nm, a small footprint …
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