ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Chuangchuang Wei,Jihui Wang,Lijin Wang,Jinxing Zhao,Zhe Yin,Aiwei Tang
Perovskites have made remarkable advancements in optoelectronics owing to their high light absorption coefficient, tunable bandgap, and long charge diffusion. Nonetheless, the practical applications of Pb-based perovskites have been hindered by the instability and toxicity of Pb, especially in flexible electronics, which require high biosecurity and low toxicity. Hence, the development of stable Pb-free perovskite materials has gained increasing attention. In this study, we synthesized stable CsBi3I10 Pb-free perovskites outside the glovebox and improved the optoelectronic and mechanical performances of the CsBi3I10-based flexible devices through polyvinylcarbazole (PVK) doping. Flexible photodetectors with the device structure of PET/ITO/PEDOT:PSS/CsBi3I10:PVK/Au was fabricated. The results indicated that the introduction of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) reduced the surface roughness of the flexible PET substrate, while PVK doping further improved the surface smoothness of CsBi3I10 thin films, thereby enhancing the interfacial charge transportation. Moreover, PEDOT:PSS and PVK acted as stepwise hole transport layers in the photodetectors. The device demonstrated a maximum responsivity of 0.3 A/W, detectivity of 2.6 × 1011 Jones, and a response time of 102 μs at 650 nm. After subjecting it to 1000 bending tests, the light current retained 80% of its initial value. This study presents a universally applicable method for controlling the surface morphology of a flexible perovskite thin film.
研究领域:
材料科学
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光电材料
·
柔性电子
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED MATERIALS
·
2023
·
IF 29.4
Ruofei Xing,Ziqing Li,Wenxiao Zhao,Dong Wang,Ranran Xie,Yanxue Chen,Limin Wu,Xiaosheng Fang
Metal halide perovskite films have gained significant attention because of their remarkable optoelectronic performances. However, their poor stability upon the severe environment appears to be one of the main facets that impedes their further commercial applications. Herein, a method to improve the stability of flexible photodetectors under water and humidity environment without encapsulation is reported. The devices are fabricated using the physical vapor deposition method (Pulse Laser Deposition & Thermal Evaporation) under high-vacuum conditions. An amorphous organic Rubrene film with low molecular polarity and high elastic modulus serves as both a protective layer and hole transport layer. After immersed in water for 6000 min, the photoluminescence intensity attenuation of films only decreased by a maximum of 10%. The demonstrator device, based on Rubrene/CsPbBr 3 /ZnO heterojunction confirms that the strategy not only enhances device moisture and mechanical stability but also achieves high sensitivity in optoelectronic detection. In self-powered mode, it has a fast response time of 79.4 µs /207.6 µs and a responsivity 124 mA W −1 . Additionally, the absence of encapsulation simplifies the fabrication of complex electrodes, making it suitable for various applications. This study highlights the potential use of amorphous organic films in improving the stability of perovskite-based flexible devices.
研究领域:
材料科学
·
光电技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2023
·Vol. 58
·期 16
·7076-7091
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IF 4.5
Jiang Bangqi,Yan Genghua,Xiao Yao,Yuan Ye,Zhao Chuanxi,Mai Wenjie,Hong Ruijiang
All-inorganic Cs 2 AgBiBr 6 film is one of most promising materials in the perovskite family for long-term daily life photodetection applications, due to its fairly nice stability and lead-free nontoxic property. However, high annealing temperature (> 250 °C) process is widely used and low temperature synthesis of high-quality Cs 2 AgBiBr 6 is still a big challenge, which limits the development toward flexible device. Herein, we developed a Mn doping solution route for Cs 2 AgBiBr 6 perovskite which is the first reported element doping process that can effectively improve the film quality under low annealing temperature. The corresponding flexible photodetectors exhibit favorable self-power characteristics and satisfying photoelectric performance with high detectivity of > 10 10 Jones, μs level response speed and large LDR over 110 dB. Such good performance can be maintained even at 120 °C fabrication process. The material properties, device performances and doping mechanism are systematically discussed in the paper. To our knowledge, this is one of the lowest temperature fabrication processes for high performance flexible Cs 2 AgBiBr 6 devices. Our results suggest a feasible method and indicate the promising application of Cs 2 AgBiBr 6 films for flexible photovoltaic devices.
研究领域:
材料科学
·
光电技术
✓ 已验证
DOI
高影响因子
NANO LETTERS
·
2016
·
IF 13.779
Pengchen Zhu,Shuai Gu,Xinpeng Shen,Ning Xu,Yingling Tan,Shendong Zhuang,Yu Deng,Zhenda Lu,Zhenlin Wang,Jia Zhu
With significant progress in the past decade, semiconductor nanowires have demonstrated unique features compared to their thin film counterparts, such as enhanced light absorption, mechanical integrity and reduced therma conductivity, etc. However, technologies of semiconductor thin film still serve as foundations of several major industries, such as electronics, displays, energy, etc. A direct path to convert thin film to nanowires can build a bridge between these two and therefore facilitate the large-scale applications of nanowires. Here, we demonstrate that methylammonium lead iodide (CH3NH3PbI3) nanowires can be synthesized directly from perovskite film by a scalable conversion process. In addition, with fine kinetic control, morphologies, and diameters of these nanowires can be well-controlled. Based on these perovskite nanowires with excellent optical trapping and mechanical properties, flexible photodetectors with good sensitivity are demonstrated.
研究领域:
材料科学
·
光学工程
·
电子工程
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Xinhong Zhao,Yu Tao,Jixiang Dong,Yongchu Fang,Xiaoxian Song,Zaoxue Yan
Wearable, portable, and biocompatible optoelectronic devices made of all-green and abundant materials and fabricated by low-temperature solution method are the key point in the development of next generation of intelligent optoelectronics. However, this is usually limited by the weaknesses of mono-component materials, such as non-adjustable photoresponse region, high carrier recombination rate, high signal-to-noise ratio, as well as the weak mechanical flexibility of bulk films. In this work, the Cs3Cu2I5/ZnO heterostructure flexible photodetectors were constructed by a low-temperature solution method combined with spin-coating technique. The heterostructure combines the low dark current and strong deep ultraviolet absorption of Cs3Cu2I5 quantum dots with the high carrier mobility of ZnO quantum dots as well as the efficient charge separation of the vertical p–n junction, to improve the photodetection performance. The heterostructure shows enhanced light/dark current ratio and ultraviolet-to-visible rejection ratios. Under an illumination of 280 nm light, an optical detectivity as high as 1.26 × 1011 Jones was obtained; the optical responsivity and response time are much better than those of control devices. After 300 times of 180° bending cycles, the photocurrent had no obvious change. The results demonstrate that the Cs3Cu2I5/ZnO heterostructure has great potential in wearable and portable visible-blind ultraviolet optoelectronic devices.
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
NANOTECHNOLOGY
·
2021
·Vol. 32
·期 48
·485203
·
IF 3.874
Yang Zhou,Chenguang Duan,Zongyu Huang,Qian Ma,Gengcheng Liao,Fei Liu,Xiang Qi
Herein, FePS3/reduced graphene oxide heterostructure has been prepared via a typical hydrothermal process, and flexible photodetectors based on hybrids have been subsequently fabricated. The photoresponse measurement results demonstrate that the photodetector exhibits obvious photoelectric conversion behavior without applied potential, indicating that the device possesses the capability to be self-powered. In addition, the photocurrent density of the as-fabricated photodetectors reaches up to 125 nA cm−2 under 90 mW cm−2 illumination intensity without an external power source, which is 5.86 times higher than single FePS3-based devices. Furthermore, the maximum attenuation in photocurrent density of the as-fabricated flexible photodetectors measured at −0.3 V after different bending cycles and bending angles is 29.8% and 17.7%, respectively. These results demonstrate that the as-fabricated photodetectors have excellent flexibility and provide a simple and effective strategy for the construction of flexible photodetectors.
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
ACS Sustainable Chemistry & Engineering
·
2021
·
IF 8.198
Yang Zhou,Hui Qiao,Zongyu Huang,Qian Ma,Fei Liu,Gengcheng Liao,Siwei Luo,Jianxin Zhong,Xiang Qi
Herein, black phosphorus (BP) quantum dots (QDs) with consistent sizes are loaded on bismuth (Bi) nanosheets (NSs) uniformly to serve as hole capturers in Group-VA monoelemental heterostructures via a facile sonication approach. The as-fabricated Bi NSs-BP QD-based photodetectors exhibit 4.6 μA/cm2 photocurrent density at applied 0.8 V bias potential, about 4.2 times enhancement compared to Bi NSs, which contributes to the construction of type-II heterojunctions that effectively restrain the recombination of electron–hole pair and accelerates the transfer rate of carriers. Additionally, the photocurrent density of Bi NSs-BP QD-based photodetectors reaches 100 nA/cm2 without external power supply, allowing fabricated devices to work normally in an emergency. Meanwhile, long-cycle stability measurements reveal 15% photocurrent density attenuation after 2000 bending times and 8.8% under 60° bending angles. This work proves that the introduction of BP QDs significantly improves the performance of the Bi-based photodetector and provides a novel strategy to construct flexible photodetectors.
研究领域:
材料科学
·
光电探测器研究
✓ 已验证
DOI
高影响因子
Materials Today Physics
·
2021
·
IF 9.298
Y. Zhang,Y. Xu,L. Gao,X. Liu,Y. Fu,C. Ma,Y. Ge,R. Cao,X. Zhang,O.A. Al-Hartomy,S. Wageh,A. Al-Ghamdi,H. Algarni,Z. Shi,H. Zhang
0D Bismuth nanoparticles (Bi NPs) are grown on the surface of 2D few-layer Nb 2 CT x MXene to form the mixed-dimensional Nb 2 CT x @Bi Schottky heterojunction . The large surface to volume area characteristic of 2D Nb 2 CT x nanosheets can provide the sufficient sites for the growth of Bi NPs, which can not only prevent the aggregation of Bi NPs, but also effectively shorten the length and transmission time of charge transfer. The Schottky heterojunction generated at the interface could lead to the uniflow spreading process of electrons/holes, promotes the separation of photo-induced electron/hole pairs, and suppress the carrier recombination dynamics, thus leading to the enhanced performance of Nb 2 CT x @Bi-based optoelectronic devices. Systematic investigations demonstrate that Nb 2 CT x @Bi-based flexible photoelectrochemical (PEC)-type photodetector shows self-powered photodetection capability with fast response/recovery time (0.08/0.08 s), a photocurrent of 1.56 μA cm −2 , a responsivity of 585.25 μA W −1 , and a specific detectivity of 4.63 × 10 12 Jones. The photodetector exhibits self-powered capability after bending 180° for 1000 cycles. Additionally, the repeatable and reproducible ON/OFF signals can be detected after placing the photodetector in alkaline electrolyte for one month, suggesting the potential of Nb 2 CT x @Bi Schottky heterojunctions for practical applications in flexible optoelectronics.
研究领域:
材料科学
·
光电子学
✓ 已验证
产品关联
DOI
高影响因子
PHYSICA STATUS SOLIDI A-APPLICATIONS AND MATERIALS SCIENCE
·
2023
·Vol. 220
·期 5
·2200612
·
IF 2
Shuzuo Liu,Dongmei Yang,Yuxin Ren,Jiaming Song,Peng Hu,Yang Jiao,Haibo Fan,Feng Teng
Self-powered and flexible photodetectors exhibit great potential in the application of optical communication, deep space exploration, and other related fields. Herein, a self-powered ultraviolet photodetector based on ZnO nanowires/Te nanowires heterojunction has been prepared by two-step vacuum filtration method, which also has superior flexibility and fast response speed. The obtained photodetector has a high photocurrent (about 1 μA) at 5 V bias under 365 nm UV light illumination and a fast response speed (3.47/0.13 s). Even if the bending angle reaches 90°, its photocurrent still maintains about 0.5 μA under 5 V bias, showing superior flexibility. Under 0 V bias, the photocurrent of the photodetector is 0.18 nA and the response time is 65/140 ms, displaying its good self-powered characteristic and fast response speed. These superior properties are caused by the flexibility of ZnO nanowire film and Te nanowire film, and the heterojunction is formed between ZnO and Te. The obtained results provide a solid foundation for the further development of flexible optoelectronic devices based on ZnO nanostructures.
研究领域:
材料科学
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光电技术
·
纳米科技
✓ 已验证
产品关联
DOI
高影响因子
Science China-Materials
·
2021
·Vol. 64
·期 11
·2858-2867
·
IF 8.273
Yu Yunru,Guo Jiahui,Bian Feika,Zhang Dagan,Zhao Yuanjin
As perovskite quantum dots (PeQDs) are performing their outstanding characteristics, incremental efforts have been devoted to such materials. Here, inspired by the spider spinning process, we present novel PeQDs microfibers with tailorable morphologies and functions from a multi-injection microfluidic approach. The microfibers were generated by introducing PeQDs precursors into each barrel of the inner capillary array and mixing them in the spindle middle channel, where the poly(vinylidene fluoride) (PVDF) dissolved in N , N -dimethyl formamide (DMF) was also injected as their sheath fluid. During this process, the PeQDs were in situ synthesized with the connection of precursor cations and anions in the core fluid; while the PVDF formed solidified microfibers to encapsulate PeQDs with the fast dispersion of DMF into the outer aqueous solution. Thus, the good encapsulation of PeQDs was achieved in PVDF microfibers, which effectively protected them from different hostile environments. Because of the highly tunable spinning processes, the microfibers exhibited controllable diameters and helical geometric structures, and the encapsulated PeQDs could yield adjustable emission peaks. Based on the PeQDs microfibers, we have explored their potential as luminescent materials in barcodes and as flexible photodetectors, which make such microfibers highly versatile for different areas.
研究领域:
材料科学
·
化学工程
·
生物仿生学
✓ 已验证
DOI
高影响因子
RSC Advances
·
2023
·Vol. 13
·期 9
·5993-6001
·
IF 3.9
Zhi Jiang,Hezhuang Liu,Jihua Zou,Yixuan Huang,Zhaoquan Xu,Denys Pustovyi,Svetlana Vitusevich
High-quality CsCu2X3 and Cs3Cu2X5 (X = Cl, Br, I) nanocrystals (NCs) exhibit excellent optoelectronic, physical, and chemical properties for detection of UV radiation due to large carrier mobility and lifetime, and heavy atoms. The nanocrystal materials can be prepared via a low-cost and simple solid-state synthesis. However, poor reproducibility and complex synthesis methods of obtaining perovskite NC thin films represent a drawback for the fabrication of the commercial photoelectric device. To address these issues, we develop highly stable CsCu2X3 and Cs3Cu2X5 NC materials using a facile solid-state reaction method for the scale-up production of halogen lead-free perovskites. We suggest a distinctive way to design a series of nanocrystalline perovskites using short-term synthesis and study the mechanism of perovskite formation using thermal solid-state synthesis. These all-inorganic and lead-free CsCu2X3 and Cs3Cu2X5 exhibit large photoluminescence quantum yields (PLQYs) up to 95.2%. Moreover, flexible paper photodetectors based on this series of lead-free perovskites show strong photoselectivity and bending stability at 254 nm, 365 nm, and 405 nm wavelengths. High-quality responses with a responsivity of 1.1 × 10−3 A W−1 and detectivity of 2.71 × 109 jones under UV illumination (10 μW cm−2) at a bias voltage of 5 mV are demonstrated. These results open prospects for designing photodetectors, LEDs, and other photosensitive devices.
研究领域:
材料科学
·
光电技术
✓ 已验证
DOI
PubMed
高影响因子
ACS Applied Nano Materials
·
2024
·
IF 5.3
Jianzong Li,Mingfang Wu,Hanxiao Zhang,Siqi Li,Can Wang,Peiyao Wang,Jiulong Sha,Xuelian Zhou
Photoelectrochemical (PEC)-type photodetectors are gaining significant interest as neoteric self-powered devices, owing to their high spectral responsivity and quick photoresponse. However, the underlying leakage issue makes the aqueous electrolyte contained inside PEC-type photodetectors unsuitable for manufacturing flexible optoelectronics. In this study, we report a flexible, self-powered PEC-type photodetector based on a cellulose-based hydrogel. Using a cellulose-based hydrogel electrolyte as the electron-transferring medium and two-dimensional Bi2O2Se nanosheet-coated indium tin oxide glass as the working electrode, the photodetector exhibits excellent self-powered capability. The hydrogel-based PEC photodetector exhibits a broadband photoresponse in the range of 365–850 nm. Moreover, under the condition of an illumination wavelength of 365 nm at a bias voltage of 0.6 V, the photodetector exhibits a responsivity of 0.68 mA/W, a detectivity of 2.44 × 108 Jones, and a fast response time of 85/103 ms, which are comparable to those of photodetectors based on traditional aqueous electrolytes. Additionally, the hydrogel-based PEC photodetectors show good flexibility and stability, maintaining more than 70.3% of their photocurrent density even after 100 cycles of bending at 120°, and no obvious photocurrent decay is observed after storage for 1 week. Based on these results, cellulose-based hydrogel electrolytes have significant potential for future applications in self-powered photodetectors.
研究领域:
材料科学
·
光电子学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）