scholarly journals High Performance CMOS Light Detector with Dark Current Suppression in Variable-Temperature Systems

Sensors ◽  
2016 ◽  
Vol 17 (12) ◽  
pp. 15 ◽  
Author(s):  
Wen-Sheng Lin ◽  
Guo-Ming Sung ◽  
Jyun-Long Lin
Keyword(s):  
Dark Current ◽  
High Performance ◽  
Variable Temperature ◽  
Light Detector

scholarly journals Low Dark Current and Performance Enhanced Perovskite Photodetector by Graphene Oxide as an Interfacial Layer

Nanomaterials ◽  
2022 ◽  
Vol 12 (2) ◽  
pp. 190
Author(s):  
Ali Hassan ◽  
Muhammad Azam ◽  
Yeong Hwan Ahn ◽  
Muhammad Zubair ◽  
Yu Cao ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Dark Current ◽  
High Performance ◽  
Carrier Transport ◽  
Defect Density ◽  
Low Cost ◽  
Degradation Process ◽  
Device Performance ◽  
Interface Engineering ◽  
Defect Passivation

Organic–inorganic hybrid perovskite photodetectors are gaining much interest recently for their high performance in photodetection, due to excellent light absorption, low cost, and ease of fabrication. Lower defect density and large grain size are always favorable for efficient and stable devices. Herein, we applied the interface engineering technique for hybrid trilayer (TiO2/graphene oxide/perovskite) photodetector to attain better crystallinity and defect passivation. The graphene oxide (GO) sandwich layer has been introduced in the perovskite photodetector for improved crystallization, better charge extraction, low dark current, and enhanced carrier lifetime. Moreover, the trilayer photodetector exhibits improved device performance with a high on/off ratio of 1.3 × 104, high responsivity of 3.38 AW−1, and low dark current of 1.55 × 10−11 A. The insertion of the GO layer also suppressed the perovskite degradation process and consequently improved the device stability. The current study focuses on the significance of interface engineering to boost device performance by improving interfacial defect passivation and better carrier transport.

The suppression of dark current for achieving high-performance Ga2O3 nanorod array ultraviolet photodetector

2022 ◽  
Author(s):  
Jia-Yun Wei ◽  
Liang-Ping Shen ◽  
Zhuo-Cheng Zheng ◽  
Yong-Chang Xu ◽  
Hao Wu ◽  
...  
Keyword(s):  
Dark Current ◽  
High Performance ◽  
Nanorod Array ◽  
Ultraviolet Photodetector

Tetraphenylethylene tethered phenothiazine-based double-anchored sensitizers for high performance dye-sensitized solar cells

2019 ◽  
Vol 7 (40) ◽  
pp. 23225-23233 ◽  
Author(s):  
Chun-Ting Li ◽  
Yi-Ling Kuo ◽  
CH. Pavan Kumar ◽  
Pei-Ting Huang ◽  
Jiann T. Lin
Keyword(s):  
Solar Cells ◽  
Dark Current ◽  
High Performance ◽  
Dye Sensitized Solar Cells ◽  
Dye Sensitized ◽  
Sensitized Solar Cells

The YL4 dye exhibits DSSC efficiencies of 10.87% (1 sun) and 27.54% (187 lux) due to effective double layered shelters (the dianchor skeleton and clogged TPE units) for blockade of dark current.

scholarly journals Additive Modulated Perovskite Microstructures for High Performance Photodetectors

Micromachines ◽  
2020 ◽  
Vol 11 (12) ◽  
pp. 1090
Author(s):  
Zhan Gao ◽  
Yifan Zheng ◽  
Guancheng Huang ◽  
Genjie Yang ◽  
Xinge Yu ◽  
...  
Keyword(s):  
Molecular Interactions ◽  
Dark Current ◽  
High Performance ◽  
Visible Region ◽  
Carbonyl Groups ◽  
High Quality ◽  
Inorganic Hybrid ◽  
Simple Route ◽  
High Efficient ◽  
Crystallographic Defects

Organic-inorganic hybrid perovskites have been widely used as light sensitive components for high-efficient photodetectors due to their superior optoelectronic properties. However, the unwanted crystallographic defects of perovskites typically result in high dark current, and thus limit the performance of the device. Herein, we introduce a simple route of microstructures control in MAPbI3 perovskites that associates with introducing an additive of 3,3,4,4-benzophenonetetracarboxylic dianhydridean (BPTCD) for crystallization adjustment of the perovskite film. The BPTCD additive can facilitate the formation of high-quality perovskite film with a compact and nearly pinhole-free morphology. Through characterizing the molecular interactions, it was found that the carbonyl groups in BPTCD is the key reason that promoted the nucleation and crystallization of MAPbI3. As a result, we obtained high-efficient and stable perovskite photodetectors with low dark current of 9.98 × 10−8 A at −0.5 V, an on/off ratio value of 103, and a high detectivity exceeding 1012 Jones over the visible region.

High-performance WO3−x-WSe2/SiO2/n-Si heterojunction near-infrared photodetector via a homo-doping strategy

2018 ◽  
Vol 6 (21) ◽  
pp. 5821-5829 ◽  
Author(s):  
Tianchao Guo ◽  
Cuicui Ling ◽  
Teng Zhang ◽  
Hui Li ◽  
Xiaofang Li ◽  
...  
Keyword(s):  
Barrier Height ◽  
Dark Current ◽  
High Performance ◽  
Near Infrared ◽  
Infrared Photodetector ◽  
Interface Barrier

The enhanced performance of WO3−x-WSe2/SiO2/n-Si can be mainly attributed to the down-shift of the EF of WO3−x-WSe2, which results in a larger interface barrier height and a greatly reduced dark current.

A High Performance UV Photodetector from Thin Film Diamond

1995 ◽  
Vol 416 ◽  
Author(s):  
Robert D. Mckeag ◽  
Michael D. Whitfield ◽  
Simon Sm Chan ◽  
Lisa Ys Pang ◽  
Richard B. Jackman
Keyword(s):  
Thin Film ◽  
Visible Light ◽  
Quantum Efficiency ◽  
Dark Current ◽  
External Quantum Efficiency ◽  
High Performance ◽  
Uv Light ◽  
High Sensitivity ◽  
Uv Photodetector ◽  
Deep Uv

ABSTRACTThin film diamond has been used to fabricate a photodetector which displays high sensitivity to deep UV light, with an external quantum efficiency of greater than one, a dark current of less than 0.1nA and which is near ‘blind’ to visible light.

High performance blue light detector based on ZnO nanowire arrays

2019 ◽  
Vol 58 (5) ◽  
pp. 1242 ◽  
Author(s):  
Yanru Xie ◽  
Hefu Li ◽  
Dong Zhang ◽  
Qingru Wang ◽  
Liqiang Zhang
Keyword(s):  
Blue Light ◽  
High Performance ◽  
Nanowire Arrays ◽  
Zno Nanowire ◽  
Light Detector ◽  
Zno Nanowire Arrays

scholarly journals Single Molecular Catalysis Identifying Activation Energy of Intermediate Product and Rate-Limiting Step in Plasmonic Photocatalysis

2019 ◽  
Author(s):  
Di Li
Keyword(s):  
Activation Energy ◽  
High Performance ◽  
Variable Temperature ◽  
Chemical Conversion ◽  
Catalytic Performance ◽  
Localized Surface Plasmon ◽  
Spatiotemporal Resolution ◽  
Rate Limiting Step ◽  
Limiting Step ◽  
Rate Limiting

Plasmon mediated photocatalysis provides a novel strategy for harvesting solar energy. Identification of rate determining step and its activation energy in plasmon mediated photocatalysis plays critical roles for understanding the contribution of hot carriers that facilitates rational designing catalysts with integrated high photo-chemical conversion efficiency and catalytic performance. However, it remains a challenge due to a lack of research tools with spatiotemporal resolution that capable of capturing intermediates. In this work, we used a single molecular fluorescence approach to investigate a localized surface plasmon resonance (LSPR) enhanced photocatalytic reaction with sub-turnover resolution. By introducing variable temperature as an independent parameter in plasmonic photocatalysis, the activation energies of tandem reaction steps, including intermediate generation, product generation and product dissociation, were clearly differentiated, and intermediates generation was found to be the rate-limiting step. Remarkably, the cause of plasmon enhanced catalysis performance was found to be its ability of lowering the activation energy of intermediates generation. This study gives new insight into the photo-chemical energy conversion pathways in plasmon enhanced photocatalysis and sheds light on designing high performance plasmonic catalysts.

scholarly journals Single Molecular Catalysis Identifying Activation Energy of Intermediate Product and Rate-Limiting Step in Plasmonic Photocatalysis

2019 ◽  
Author(s):  
Di Li
Keyword(s):  
Activation Energy ◽  
High Performance ◽  
Variable Temperature ◽  
Chemical Conversion ◽  
Catalytic Performance ◽  
Localized Surface Plasmon ◽  
Spatiotemporal Resolution ◽  
Rate Limiting Step ◽  
Limiting Step ◽  
Rate Limiting

Plasmon mediated photocatalysis provides a novel strategy for harvesting solar energy. Identification of rate determining step and its activation energy in plasmon mediated photocatalysis plays critical roles for understanding the contribution of hot carriers that facilitates rational designing catalysts with integrated high photo-chemical conversion efficiency and catalytic performance. However, it remains a challenge due to a lack of research tools with spatiotemporal resolution that capable of capturing intermediates. In this work, we used a single molecular fluorescence approach to investigate a localized surface plasmon resonance (LSPR) enhanced photocatalytic reaction with sub-turnover resolution. By introducing variable temperature as an independent parameter in plasmonic photocatalysis, the activation energies of tandem reaction steps, including intermediate generation, product generation and product dissociation, were clearly differentiated, and intermediates generation was found to be the rate-limiting step. Remarkably, the cause of plasmon enhanced catalysis performance was found to be its ability of lowering the activation energy of intermediates generation. This study gives new insight into the photo-chemical energy conversion pathways in plasmon enhanced photocatalysis and sheds light on designing high performance plasmonic catalysts.

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