CHEMICAL RESEARCH IN CHINESE UNIVERSITIES
·
2023
·Vol. 39
·期 4
·654-659
·
IF 3.1
Zhu Xia,An Jiakun,Chen Gaoyu,Xing Chenyu,Bao Jianchun,Xu Xiangxing
Perovskite single crystals are prominent semiconductor materials due to their high carrier mobility, long carrier diffusion length, and large absorption coefficient. They can be used as optoelectronic functional materials for narrowband or broadband photodetectors. In this report, the photodetection band tunability was achieved by doping MAPbX 3 (MA=methylammonium, X=Cl/Br/I) perovskite single crystals with sub-nano carbon dots (MAPbX 3 -C). The sub-nano size and good dispersibility of the carbon dots ensured controllable doping. The absorption of the sub-nano carbon dots and trap states in the MAPbX 3 -C single crystals resulted in the special responsivity spectrum features.
研究领域:
材料科学
·
光电子学
·
半导体物理
·
纳米技术
·
光子学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Xinxue Wu,Chaolong Fang,Wangdong Xu,Dawei Zhang
Natural compound eyes endow arthropods with wide-field high-performance light-harvesting capability that enables them to capture prey and avoid natural enemies in dim light. Inspired by natural compound eyes, a curved artificial-compound-eye (cACE) photodetector for diffused light harvesting is proposed and fabricated, and its light-harvesting capability is systematically investigated. The cACE photodetector is fabricated by introducing a cACE as a light-harvesting layer on the surface of a silicon-based photodetector, with the cACE being prepared via planar artificial-compound-eye (pACE) template deformation. The distinctive geometric morphology of the as-prepared cACE effectively reduces its surface reflection and the dependence of the projected area on the incident light direction, thereby significantly improving the light-harvesting ability and output photocurrent of the silicon-based photodetector. Furthermore, the performances of cACE, pACE, and bare polydimethylsiloxane (PDMS)-attached photodetectors as diffused light detectors are investigated under different luminances. The cACE-photodetector output photocurrent is 1.395 and 1.29 times those of the bare PDMS-attached and pACE photodetectors, respectively. Moreover, this photodetector has a desirable geometric shape. Thus, the proposed cACE photodetector will facilitate development of high-performance photodetectors for luminance sensing.
研究领域:
光学
·
生物仿生学
✓ 已验证
DOI
PubMed
高影响因子
Advanced Materials Interfaces
·
2017
·Vol. 5
·期 3
·1701189
·
IF 4.279
Jia Qi,Nan Ma,Ya Yang
Ferroelectric material BiFeO 3 with narrow bandgap of 2.67 eV can be more suitable to fabricate photodetectors instead of solar energy harvesters because of low energy conversion efficiency. Herein, a BiFeO 3 film-based self-powered photodetector is reported by using the photovoltaic–pyroelectric coupled effect to enable a fast sensing of 450 nm light illumination. Compared with photovoltaic effect, the photosensitivity parameters including photoconductive gain, responsivity, and specific detectivity can be enhanced by more than 9.7 times at light intensity of 0.86 mW cm −2 by utilizing light-induced photovoltaic–pyroelectric coupled effect. Moreover, a self-powered photodetector array system is achieved to detect 450 nm light by analyzing the real-time recorded output voltage signals as a mapping figure. In this work a new route to realize the performance enhancement of photodetector via photovoltaic–pyroelectric coupled effect on ferroelectric materials, which has great significance in extending the field of self-powered photodetectors is described.
研究领域:
材料科学
·
光电探测技术
✓ 已验证
产品关联
DOI
高影响因子
Laser & Photonics Reviews
·
2024
·
IF 9.8
Yin He,Zeyao Han,Junyu Li,Yu Gu,Yousheng Zou,Yao Wang,Jialin Yang,Wei Lei,Xiaobao Xu
Light detection and ranging (Lidar), which utilizes scattered near-infrared (NIR) light to identify objects, has shown great potential in remote sensing, autonomous driving, robotic vision, etc. However, the intensity of the scattered NIR light is significantly reduced, placing stringent demands on the selectivity and fast response of the sensing. Even though optical filters can be used to select weak signals, the photon losses arising from additional interfaces are inevitable, thus reducing the signal-to-noise ratio (SNR). In this work, a series of organic narrowband photodetectors are constructed with tunable and selective responses from 700 to 950 nm with a minimum full-width-at-half-maximum (FWHM) of ≈30 nm. To enhance response sensitivity and speed, delicate and compact photodiode architecture is applied through comprehensive device engineering. As a result, the detectors possess a sensitive response to weak NIR light with a detection limit of 3 nW, and response rise time ( τ r ) and decay time ( τ d ) of ≈24 ns and ≈1.3 µs, respectively. Moreover, a proof-of-concept Lidar based on these organic photodetectors is demonstrated with a distance resolution of ≈10 cm, which further confirms the great potential in practical application.
研究领域:
光学工程
·
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
APL Materials
·
2022
·Vol. 10
·期 4
·
IF 6.635
Wang Mengrou,Xu Yubing,Wang Xin,Li Yuwei,Zhao Jingda,Pan Yuzhu,Chen Jing,Li Qing,Zhao Zhiwei,Wu Jun,Lei Wei
All-inorganic halide semiconductors with perovskite or perovskite-like structure have aroused a widespread concern recently for its environmental friendliness and stabilities while possessing excellent optoelectronic properties. Double perovskite Cs 2 AgBiBr 6 single crystal (SC) is one of the most representative materials in the latest research area. To further improve the device response range and decrease its dark current density effectively, functional layers based on the solution-processed epitaxial method are normally fabricated as heterojunctions. Herein, a novel idea of a broadband heterojunction MAPbI 3 (MA = CH 3 NH 3 )/Cs 2 AgBiBr 6 is proposed in this work to achieve this goal. A MAPbI 3 layer is fabricated on Cs 2 AgBiBr 6 SC substrates through immersing Cs 2 AgBiBr 6 SC into MAPbI 3 solution at a MAPbI 3 crystallization temperature. Ultimately, this heterojunction device expands the absorption limit from 618 to 838 nm, makes responsivity range redshift from 629 to 860 nm, and achieves a responsivity of 16.8 mA W −1 while the detectivity of 1.33 × 10 11 Jones under 622 nm 0.55 mW cm −2 illumination at −20 V bias, maintaining excellent optoelectronic properties.
研究领域:
材料科学
·
光电材料
·
半导体物理
✓ 已验证
DOI
高影响因子
Journal of Science-Advanced Materials and Devices
·
2022
·
IF 7.382
Na Wang,Renrong Zheng,Jiang Chen,Zan Ding,Haisheng San,Shaoda Zhang
Self-driven ultraviolet photodetectors based on wide-bandgap semiconductors have been well investigated but are still being explored for further performance enhancement. Here we report a self-driven electrochemical ultraviolet photodetector (EUVPD) using a three-dimensional nanostructured photoanode based on defect-engineered TiO 2 nanotube arrays (TNAs) modified with single-walled carbon nanotubes (SWCNTs) to enhance photoelectric performance. The EUVPDs based on Ar-annealed TNAs modified with 0.1 mg/mL of SWCNTs were found to have higher responsivity (∼60 mA/W), higher on/off current ratio (∼4.3 × 10 3 ), the faster response time (4 ms of rise-time and 27 ms of decay-time) when compared with unmodified and air-annealed ones. This performance enhancement is attributed to the highly efficient separation and transport of photoexcited carriers through the electrochemical redox reaction in the SWCNTs network anchored on the defect-engineered TNAs/electrolyte heterojunction nanostructure.
研究领域:
材料科学
·
光电化学
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2019
·Vol. 9
·期 12
·1738
·
IF 4.034
Kaixuan Song,Jifeng Yuan,Ting Shen,Jiuyao Du,Ruiqi Guo,Tönu Pullerits,Jianjun Tian
A technique for scalable spray coating of colloidal CdSeTe quantum dots (QDs) for photovoltaics and photodetector applications is presented. A mixture solvent with water and ethanol was introduced to enhance the adhesive force between QDs and the substrate interface. The performance of the detector reached the highest values with 40 spray coating cycles of QD deposition. The photodetectors without bias voltage showed broadband response in the wavelength range of 300–800 nm, and high responsivity of 15 mA/W, detectivity of more than 1011Jones and rise time of 0.04 s. A large size QD-logo pattern film (10 × 10 cm2) prepared by the spray coating process displayed excellent uniformity of thickness and absorbance. The large area detectors (the active area 1 cm2) showed almost the same performance as the typical laboratory-size ones (the active area 0.1 cm2). Our study demonstrates that the spray coating is a very promising film fabrication technology for the industrial-scale production of optoelectronic devices.Keywords:quantum dots;spray coating;photodetector
研究领域:
材料科学
·
光电子学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Coatings
·
2021
·Vol. 11
·期 9
·1099
·
IF 2.881
Yifei Wang,Xiaoping Zou,Jialin Zhu,Chunqian Zhang,Jin Cheng,Junqi Wang,Xiaolan Wang,Xiaotong Li,Keke Song,Baokai Ren,Junming Li
With the development of the semiconductor industry, research on photoelectronic devices has been emphasized. In this paper, a molecular semiconductor material with a narrow bandgap of hexane-1,6-diammonium pentaiodobismuth (HDA-BiI5) was utilized to prepare photodetectors without electron transport layers. Using a single light source, the effects of different wavelengths and different powers on the photoresponsivity, switching ratio, specific detectivity, and external quantum efficiency of the device were investigated. It is demonstrated that this device has excellent responsivity, specific detectivity, stability, and repeatability, and this work will help expand the application of molecular semiconductor materials for photodetection.Keywords:photodetector;molecular semiconductor;thin films
研究领域:
材料科学
·
光电技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Photonics
·
2024
·
IF 6.5
Silu Peng,Chaoyi Zhang,Xianchao Liu,Jiayue Han,Chunyu Li,Hongxi Zhou,He Yu,Chao Chen,Jun Gou,Jun Wang
PbSe is one of the most representative materials in lead chalcogenide semiconductors, possessing a narrow bandgap and demonstrating excellent absorption and photoresponse. However, undoped PbSe typically exhibits low carrier concentrations, along with large dielectric constants and thermal expansion coefficients, imposing limitations on its application in a high-performance photodetector. Doping is an effective strategy to overcome the inherent defects and enhance the optical and electrical properties. In this study, different compositions of Pb1−xLaxSe samples were obtained through solid-phase method doping with the rare earth element La. The doped Pb0.7La0.3Se showed superior optical and electrical properties and photoresponse. Additionally, based on the approach of constructing heterojunctions with thin films and two-dimensional (2D) materials, a self-powered p−n heterojunction photodetector, Pb0.7La0.3Se/WSe2, has been successfully fabricated. The device exhibited a continuous and stable light response from 405 to 1550 nm. Moreover, under 0 V bias and 650 nm laser irradiation, the device achieved the responsivity and specific detectivity of 22.85 A/W and 1.81 × 1012 Jones, along with a rapid response/recovery time (162/135 μs), demonstrating excellent photovoltaic effects and outstanding photodetection performance. The construction of heterojunctions with film and 2D materials provides a novel approach to achieving high-performance photodetectors. Simultaneously, the Pb0.7La0.3Se/WSe2 detector shows enormous potential in the field of superior photodetectors with a high on/off ratio, low noise, broadband, rapid response, and miniaturization.
研究领域:
材料科学
·
光电技术
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2022
·Vol. 12
·期 52
·33780-33788
·
IF 4.036
Jiaojiao Liu,Jie Zhang
It has been a universal route for enhanced photoelectric performance in photodetectors by constructing a heterojunction that is conductive for suppressing recombination of photogenerated carriers and promoting collection efficiency, and probably producing self-powered capability. However, the dependence of the built-in electric field distributions created by the heterojunction on photodetector performance has rarely been investigated. Herein, two kinds of self-powered UV–visible photodetectors with different device architectures based on single Se wire and CsPbBr3 particles are facilely fabricated and compared. It is found that both the two photodetectors show excellent self-powered operating properties, fast response and binary response. However, due to the different distributions of built-in electric field caused by device architectures, it yields a significant photovoltaic voltage distinction and different responsivity and detectivity spectra for the Se/CsPbBr3 photodetectors. These results are conductive to guide the design of self-powered heterojunction photodetectors by regulating the built-in electric field distributions.
研究领域:
材料科学
·
光子学
·
纳米技术
·
电气工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Green Processing and Synthesis
·
2022
·Vol. 11
·期 1
·536-544
·
IF 3.97
Ba-Duc Tran,Phuong-Nam Tran,Xuan-Thanh Bui,Duy-Hung Nguyen,Thanh-Tung Duong
In this study, CsPb 1– x
Mn
x
Br 3–2 x
Cl 2 x
( x = 0–0.5) nanoparticles were synthesized directly in toluene solvents at high temperature. This approach results in small-size nanoparticles, which can be used in photoelectric components without adding a filtration process to eliminate high-temperature solvents such as octadecene. The high content Mn 2+ -incorporated CsPb(Cl/Br) 3 host is observed by strongly wideband emission at 592 nm of manganese d-states spin and orbital forbidden transition. After infiltration into mesoporous TiO 2 , the Mn 2+ ion receives energy from the CsPb(Cl/Br) 3 host (irradiated 405 nm light-emitting diode source) and effectively transfers to the TiO 2 scaffold layer. As a result, a metal/semiconductor/metal planar structure photodetector with m-TiO 2 /CsPb 1– x
Mn
x
Br 3–2 x
Cl 2 x
( x = 0–0.5) composite showed several figures of merit compared to bare m-TiO 2 and m-TiO 2 /CsPbBr 3 such as on/off ratio of 10 4 times, responsivity of 1.67 A·W −1 , and detectivity of 4.42 × 10 9 Jones. The key factors contributing to the growth of the on/off ratio include the decreasing dark current and enhancing exciton energy and transportation due to the infiltration of CsPb 1– x
Mn
x
Br 3–2 x
Cl 2 x
( x = 0–0.5) perovskite quantum dots into mesopores of the m-TiO 2 scaffold layer.
研究领域:
材料科学
·
纳米技术
·
光子学
·
半导体器件
✓ 已验证
DOI
高影响因子
Functional Materials Letters
·
2023
·
IF 1.3
Pu Qin,Chengyan Zhu,Malik Ashtar,Ming Li,Yuan Liu,Mingming Chen,Dawei Cao,Ying Yang
ZnO is one of the most popular materials in UV photodetectors, but its low switching and long attenuation time seriously hinder its practical application. In this work, the performance of PZT/ZnO planar photodetectors is optimized by using the ferroelectric polarization of PZT thin films. The results show that the residual polarization field of PZT affects the electron arrangement in ZnO film, making ZnO in a depleted state, reducing the dark current of resulted photodetectors, and influencing the carrier life. By inhibiting recombination, the photocurrent is increased, and the switching ratio of the ZnO photodetector is increased by 5 times, and more importantly, the optical responsivity increases by 7 times to 1.015 A/W. This work provides a simple and feasible method for ferroelectric polarization to control the performance of two-dimensional material photodetectors.
研究领域:
材料科学
·
光学工程
✓ 已验证
DOI
高影响因子
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