Advanced Electronic Materials
·
2021
·Vol. 8
·期 4
·2100997
·
IF 7.295
Junyu He,Peilong Xu,Ruifu Zhou,Hao Li,Hongliang Zu,Jun Zhang,Yuanbin Qin,Xuhai Liu,Fengyun Wang
Ultraviolet (UV) photodetectors play an important role in numerous commercial and scientific applications. The UV photodetectors based on binary-cation indium zinc oxide (InZnO) thin films exhibit great performance enhancement, compared with their single-cation counterparts. However, UV photodetectors based on 1D InZnO nanowires could potentially exhibit more superior optoelectrical performance, due to the large surface-to-volume ratio and favorable carrier transport characteristics of nanowires. This work has combined combustion synthesis with electrospinning technique to efficiently fabricate InZnO nanowire-based UV photodetectors. At the annealing temperature of 375 °C, the newly designed InZnO nanowire photodetectors exhibit excellent photoelectric performance under the irradiation of 310 nm UV light, including a photo-to-dark current ratio of 1.2 × 10 4 , a photo responsivity of 2.8 × 10 3 A W –1 , and a high detectivity of 2.4 × 10 16 Jones. This study not only demonstrates the opportunity to construct new-generation transparent electronics based on 1D metal oxide nanowires but also sheds new light on how to further decrease the annealing temperature of metal oxide nanowire devices for low-temperature fabrication processes.
研究领域:
材料科学
·
纳米科技
·
光电子学
·
半导体器件
·
功能材料
✓ 已验证
DOI
高影响因子
RSC Advances
·
2019
·Vol. 9
·期 14
·8039-8047
·
IF 3.049
Peng Gu,Xinghua Zhu,Dingyu Yang
Mn-doped ZnO (MZO) films were prepared on glass substrates using sol–gel dip-coating technology. The microstructural, morphological, optical and photoelectric properties of MZO films were investigated at different withdrawal speeds (WS: 20, 40, 60 and 80 mm s−1). The X-ray diffraction (XRD) patterns showed that all the films obtained were polycrystalline with a hexagonal structure, and the highest crystallinity of MZO films was observed as films were deposited at 40 mm s−1. The UV-Vis spectra revealed that the average optical transmittance of all samples was over 60% and the energy band gap of films decreased from 3.616 to 3.254 eV with the increase in withdrawal speed. The formed Au/MZO/Au photodetectors (PDs) indicate that a device prepared at 40 mm s−1 shows superior properties both in response speed and detection capability, and the rise time is 1.871 s and fall time is 3.309 s at 365 nm for 3 V bias and the detectivity (D*) reaches ∼1.7 × 1010 Jones. Moreover, the responsivity of PDs is also affected by the distance between Au electrodes and external bias. This research provides a simple way to fabricate the UV PDs based on MZO films with faster response and higher detectivity.
研究领域:
材料科学
·
半导体物理
·
光电子学
·
薄膜技术
·
纳米材料
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2017
·
IF 3.133
Ming Li,Xiaoqin Yuan,Haoran Ruan,Xiandong Wang,Yongping Liu,Zhenhuan Lu,Jiefeng Hai
A new method for synthesizing freestanding PbS-CH 3 NH 3 PbI 3 (MAPI) core-shell nanoparticles (NPs) with enhanced light absorption and photoelectric properties was reported. The transmission electron microscopy (TEM) and energy dispersive spectrometer (EDS) analysis confirmed the core-shell structure of the obtained sample. The Vis-NIR spectra proved the core-shell sample absorbed light both in visible and near infrared region . For comparison, oleic acid/oleylamine molecule capping PbS NPs, MAPI molecule capping PbS NPs, and PbS-MAPI core-shell NPs were used to fabricate Schottky solar cells. PbS-MAPI core-shell NPs based solar cells delivered a photocurrent response from both the PbS and MAPI, and achieved the highest overall PCE.
研究领域:
材料科学
·
纳米科技
·
光电子学
·
能源材料
·
半导体物理
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2012
·
IF 3.832
Pingfan Du,Lixin Song,Jie Xiong,Ni Li,Zhenqiang Xi,Longcheng Wang,Dalai Jin,Shaoyi Guo,Yongfeng Yuan
Novel TiO 2 /ZnO core–sheath nanofibers (NFs) film was fabricated through an extraordinary coaxial electrospinning technique . Dye-sensitized solar cells (DSSCs) were assembled using the TiO 2 /ZnO NFs film as photoanode . FESEM , TEM, FTIR , XRD , XPS and UV–vis were used to characterize the NFs electrode film. Photocurrent–voltage ( I – V ) characteristic, incident photo-to-current conversion efficiency (IPCE) spectrum, and electrochemical impedance spectroscopy (EIS) measurements were performed to evaluate the DSSCs performance. The results reveal that the DSSCs based on the TiO 2 /ZnO core–sheath NFs are superior to their bare TiO 2 NFs-based counterparts. Compared with the latter, the overall energy conversion efficiency was enhanced from 4.47 to 5.17%. And the possible mechanism for this enhancement was discussed.
研究领域:
材料科学
·
纳米技术
·
能源材料
·
光电化学
·
半导体薄膜
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）