Photomultiplication type organic photodetectors with tunable spectral response range

2019 ◽  
Vol 69 ◽  
pp. 354-360 ◽  
Author(s):  
Zijin Zhao ◽  
Jian Wang ◽  
Jianli Miao ◽  
Fujun Zhang
Nanomaterials ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 1404
Author(s):  
Yi Li ◽  
Hu Chen ◽  
Jianhua Zhang

As a promising candidate for next-generation photodetectors, organic photodetectors (OPDs) have gained increasing interest as they offer cost-effective fabrication methods using solution processes and a tunable spectral response range, making them particularly attractive for large area image sensors on lightweight flexible substrates. Carrier blocking layers engineering is very important to the high performance of OPDs that can select a certain charge carriers (holes or electrons) to be collected and suppress another carrier. Carrier blocking layers of OPDs play a critical role in reducing dark current, boosting their efficiency and long-time stability. This Review summarizes various materials for carrier blocking layers and some of the latest progress in OPDs. This provides the reader with guidelines to improve the OPD performance via carrier blocking layers engineering.


2019 ◽  
Vol 7 (6) ◽  
pp. 1544-1550 ◽  
Author(s):  
Jianbin Wang ◽  
Qingdong Zheng

In comparison with PEDOT:PSS-based OPDs, ZnO-based OPDs show a broader spectral-response range with enhanced EQE, responsivity and detectivity.


Author(s):  
Mengyao Liu ◽  
Jian Wang ◽  
Kaixuan Yang ◽  
Ming Liu ◽  
Zijin Zhao ◽  
...  

Broadband photomultiplication organic photodetectors (PMOPDs) can be achieved with double-layered active layer preparing from IEICO-4F:PBDB-T blend solutions with different weight ratios (1:1 or 3:100, wt/wt). The response range of the...


RSC Advances ◽  
2015 ◽  
Vol 5 (13) ◽  
pp. 10026-10032 ◽  
Author(s):  
Wenxia Li ◽  
Jingbo Zhang ◽  
Yingyu Cao ◽  
Yuan Lin

To extend the spectral response range of dye-sensitized solar cells through Förster resonant energy transfer, eosin Y and rhodamine B were chosen as an donor and a acceptor to cubic-sensitize nanocrystalline ZnO thin film.


Micromachines ◽  
2020 ◽  
Vol 11 (2) ◽  
pp. 129
Author(s):  
Ru Chen ◽  
Zhiqing Lu ◽  
Kun Zhao

In this paper, we investigate the broad spectral photocurrent properties of the La0.67Ca0.33MnO3/Si (LCMO/Si) heterojunction from 200 nm to 2.0 μm, as the temperature increases from 95 to 300 K. We observed the junction’s uniform responsivity in the visible range and five absorption peaks at 940 nm, 1180 nm, 1380 nm, 1580 nm, and 1900 nm wavelengths. The temperature showed effective affection to the photocurrents at absorption peaks and the transition point occurred at 216 K, which was also displayed in the temperature dependence of junction resistance. On the basis of the results, we propose a possible model involving the quantum size effect at the junction interface as the mechanism. This understanding of the infrared photodetection properties of oxide heterostructures should open a route for devising future microelectronic devices.


2019 ◽  
Vol 4 (1) ◽  
pp. 138-147 ◽  
Author(s):  
Tao Tong ◽  
Shujuan Wang ◽  
Jie Zhao ◽  
Baochang Cheng ◽  
Yanhe Xiao ◽  
...  

Single CdS nanobelt-based photodetectors show an ultra-high response to light close to the bandgap energy at large bias, and moreover their spectral response range selectivity to above- and below-bandgap light can show an reversable memory by temperature-writing and bias-erasing.


Scanning ◽  
2017 ◽  
Vol 2017 ◽  
pp. 1-10 ◽  
Author(s):  
Liu Han ◽  
Haohao Dong ◽  
Dong Mao ◽  
Baolv Hua ◽  
Qinyu Li ◽  
...  

Heterojunction system has been proved as one of the best architectures for photocatalyst owing to extending specific surface area, expanding spectral response range, and increasing photoinduced charges generation, separation, and transmission, which can provide better light absorption range and higher reaction site. In this paper, Indium Sulfide/Flexible Electrospun Carbon Nanofiber (In2S3/CNF) heterogeneous systems were synthesized by a facile one-pot hydrothermal method. The results from characterizations of SEM, TEM, XRD, Raman, and UV-visible diffuse reflectance spectroscopy displayed that flower-like In2S3 was deposited on the hair-like CNF template, forming a one-dimensional nanofibrous network heterojunction photocatalyst. And the newly prepared In2S3/CNF photocatalysts exhibit greatly enhanced photocatalytic activity compared to pure In2S3. In addition, the formation mechanism of the one-dimensional heterojunction In2S3/CNF photocatalyst is discussed and a promising approach to degrade Rhodamine B (RB) in the photocatalytic process is processed.


2020 ◽  
Vol 10 (11) ◽  
pp. 1877-1891
Author(s):  
Yingcheng Liu ◽  
Abdukeyum Abdurexit ◽  
Ruxangul Jamal ◽  
Wenli Zhang ◽  
Yinqiang Yan ◽  
...  

In this paper, new π-conjugated heterocyclic systems with pyrimidine- and pyridine-grafted polyterthiophene were combined with TiO2 to obtain composite materials (PDTPrT/TiO2 and PDTPrmT/TiO2). The photocatalytic properties of the composites were tested by using them to degrade MB using UV-light and simulated solar irradiation. The structural analysis revealed that the pyrimidine and pyridine groups in the polyterthiophenes interacted with TiO2 via non-covalent interactions. The combination of the substituted polyterthiophene and TiO2 restrained the recombination rate of photogenerated e-?h+ pairs and broadened the spectral response range of TiO2. The results indicated that PDTPrT/TiO2 and PDTPrmT/TiO2 with a TiO2-to-monomer molar ratio of 75 had the highest photodegradation rates under UV light (98.6% and 97.4%, respectively after 10 min) and simulated solar (95.4% and 92.7%, respectively after 300 min).


RSC Advances ◽  
2015 ◽  
Vol 5 (63) ◽  
pp. 51308-51317 ◽  
Author(s):  
Jingqiang Pan ◽  
Xinyong Li ◽  
Qidong Zhao ◽  
Dongke Zhang

Zn0.5Mg0.5Fe2O4 nanoparticles contribute to widening of the spectral response range and reducing the charge recombination of TiO2 nanotube arrays.


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