Nano Energy
·
2019
·
IF 15.548
Nan Ma,Ya Yang
Research of photovoltaic effect has been increased based on ferroelectric materials , generating a series of important discoveries. However, the conventional ferroelectric ceramics usually have low photocurrent values. How to increase the photocurrent of ceramics becomes an important issue to push forward the practical application of these devices. Here, we report the intrinsic properties about the temperature dependence of photocurrent and its relationship with the ferroelectric polarization. The photocurrent of BaTiO 3 ceramics strongly depends on the temperature, which can achieve an enhancement of 121.9～179.6% at low temperature (80–240 K) as compared with that at room temperature. The enhancement of photocurrent is associated with ferro-pyro-phototronic effect, evidencing by the enhanced ferroelectric polarization and the activation of shallow trap levels at low temperature, which can be used for detecting 405 nm light under low temperature. This research provides a potential approach to boost the photocurrent of ferroelectric ceramics and enable the development of a wide range of optoelectronic devices.
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
Energy Material Advances
·
2024
·
IF 14.8
Yanbing Han,Jiao Fang,Han Zhang,Yiyang Sun,Yifang Yuan,Xu Chen,Mochen Jia,Xinjian Li,Han Gao,Zhifeng Shi
Chalcogenide perovskites represent a promising class of materials known for their robust stability, environmentally friendly composition, and intriguing optoelectronic characteristics. Their A-site cation is largely dependent on nonmagnetic Ca, Sr, Ba elements, showing little influences on the optoelectronic properties of chalcogenide perovskites. Here, by introducing magnetic element Eu as A-site cation, we present a comprehensive investigation into the crystal structures, band characteristics, optoelectronic features, and magnetic behaviors of EuHfS3, targeting for photovoltaics. EuHfS3 adopts a distorted perovskite structure within the Pnma space group. This structure allows for various magnetic configurations, setting foundations for multiple photovoltaic effect. The conduction band maximum primarily originates from the Hf 5d orbitals, akin to SrHfS3. Intriguingly, the presence of Eu spin-up 4f orbitals lifts the covalence band minimum, consequently narrowing the band gap of EuHfS3 (1.6 eV), which is suitable for absorber layer in p-i-n junction solar cells. Moreover, zero field cooled magnetization measurements reveal antiferromagnetic behavior in EuHfS3, indicating further spin photovoltaic effect. The integration of magnetic properties into chalcogenide perovskites, in conjunction with their inherent semiconducting attributes, holds promise for future advancements in photovoltaics and other spintronic device technologies.
研究领域:
材料科学
·
光电子学
·
磁学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Xiao Wu,Peng Wang,Xingan Jiang,Shuyao Cao,Jinfeng Lin,Rui Xiong,Zhenhuan Zheng,Min Gao,Chunlin Zhao,Tengfei Lin,Cong Lin,Baisheng Sa
Photoferroelectrics that involve strong light-matter coupling are regarded as promising candidates for realizing bulk photovoltaic and photoelectric effects via light absorption. Nonetheless, understanding the photoresponse mechanism or modulation of performance from a microscopic point of view is scarcely explored through quantification of macroscopic properties. Herein, we design a model material, Gd3+-doped (K0.5Na0.5)NbO3 ferroelectric-transparent ceramics, and present an advantageous strategy to enhance the optoelectronic coupling through joint modulations of lattice distortion and oxygen vacancies, along with inner defects and ferroelectric domains. Significantly, their microcosmic manipulation can be intuitively and facilely evaluated by the optical transparency of each ceramic. An approximately 104 fold increase in conductivity under ultraviolet irradiation was produced. Under the cocoupling between external physical fields, the synergy of photoelectric stimulation increased the photoconductivity of the ceramics by 13.89 times. Additionally, a significant increase (4.5-fold) in the current output from the photovoltaic effect was achieved via ferroelectric domains of moderate size, whose size could be easily assessed by optical transmittance. In situ microscopic observations confirmed that the configuration of oxygen vacancy-dependent ferroelectric domains contributes to the enhanced optoelectronic response. This research provides a distinct way to develop inexpensive optocoupler devices and meet the requirements for multifunctional integration in single photoferroelectrics.
研究领域:
材料科学
·
光学
·
电子工程
✓ 已验证
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2020
·Vol. 30
·期 49
·2006166
·
IF 16.836
Bao Jin,Nian Zuo,Zhi-Yi Hu,Wenjun Cui,Renyan Wang,Gustaaf Van Tendeloo,Xing Zhou,Tianyou Zhai
P–n photovoltaic junctions are essential building blocks for optoelectronic devices for energy conversion. However, this photovoltaic efficiency has almost reached its theoretical limit. Here, a brand-new excitonic photovoltaic effect in 2D CsPbBr 3 /CdS heterostructures is revealed. These heterostructures, synthesized by epitaxial growth, display a clean interface and a strong interlayer coupling. The excitonic photovoltaic effect is a function of both the built-in equilibrium electrical potential energy and the chemical potential energy, which is generated by the significant concentration gradient of electrons and holes at the heterojunction interface. Excitingly, this novel photovoltaic effect results in a large open-circuit voltage of 0.76 V and a high power conversion efficiency of 17.5%. In addition, high photodetection performance, including a high photoswitch ratio ( I light / I dark ) of 10 5 and a fast response rate of 23 µs are obtained. These findings provide a new platform for photovoltaic applications.
研究领域:
材料科学
·
光电子学
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Linxing Zhang,Jun Chen,Longlong Fan,Zhao Pan,Jiaou Wang,Kurash Ibrahim,Jianjun Tian,Xianran Xing
To settle the growing energy crisis, photovoltaic , as the renewable solar energy, based on ferroelectric oxides has recently attracted significant attention for the breakthrough in photovoltaic application. Herein, we deposited the ferroelectric Bi 0.925 Sm 0.075 Fe 0.95 Co 0.05 O 3 (BSFC) thin films on FTO glass substrates along with uniform microstructure and multi-orientation polycrystalline. The BSFC thin films possess good ferroelectric properties with a standard hysteresis loop attributed to Co-substitution. Intriguingly, an enhancement of both photocurrent (90.4%) and photovoltage (40.0%) in BSFC thin films has been observed, indicating that the ferroelectric polarization plays an important role in the bulk effect of ferroelectric photovoltaic. Furthermore, the Co-substitution induced an increasing trend in saturation magnetization of 6.2 emu/cm 3 in BSFC thin films. The enhancement of the multiferroics and photovoltaic properties facilitates its applications of energy conversion and information storage.
研究领域:
材料科学
·
能源科学
·
物理学
✓ 已验证
DOI
高影响因子
Nano Energy
·
2018
·
IF 13.12
Nan Ma,Ya Yang
Photocurrent can be generated in ferroelectric devices with vertical-structured sandwich configurations due to photovoltaic effect , which has potential applications in electronic devices such as photodetectors owing to no use of any external power source . However, how to effectively enhance the photocurrent in ferroelectric materials still remains one of the key challenges for these applications. We report a dramatic increase of photocurrent in a ferroelectric BaTiO 3 -based self-powered photodetector by utilizing two dimensional planar-structured contact electrode configurations. As compared with that of conventional vertical-structured device, the fabricated planar-structured device exhibits over 900-fold enhancement of stable photocurrent under 365 nm UV light illumination. A physical model based on band energy theory has been utilized to explain the origin of the observed phenomenon. The remarkable enhancement of photocurrent in ferroelectric materials by using this route will open a new area of two dimensional planar-structured ferroelectric photodetectors.
研究领域:
材料科学
·
电子工程
✓ 已验证
产品关联
DOI
高影响因子
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
·
2014
·Vol. 54
·期 3
·956-960
·
IF 11.336
Hanying Li,Congcheng Fan,Weifei Fu,Huolin L. Xin,Hongzheng Chen
Graphical Ideal candidates for high-performance photovoltaics , organic single-crystalline heterojunctions are difficult to prepare. Now, extended single-crystalline heterojunctions with consistent donor-top and acceptor-bottom structure throughout the substrate can be obtained from a mixed solution of donor and acceptor through sequential crystallization. These heterojunctions exhibit a significant photovoltaic effect. Organic single crystals are ideal candidates for high-performance photovoltaics due to their high charge mobility and long exciton diffusion length; however, they have not been largely considered for photovoltaics due to the practical difficulty in making a heterojunction between donor and acceptor single crystals. Here, we demonstrate that extended single-crystalline heterojunctions with a consistent donor-top and acceptor-bottom structure throughout the substrate can be simply obtained from a mixed solution of C 60 (acceptor) and 3,6-bis(5-(4- n -butylphenyl)thiophene-2-yl)-2,5-bis(2-ethylhexyl)pyrrolo[3,4- c ]pyrrole-1,4-dione (donor). 46 photovoltaic devices were studied with the power conversion efficiency of (0.255±0.095) % under 1 sun, which is significantly higher than the previously reported value for a vapor-grown organic single-crystalline donor–acceptor heterojunction (0.007 %). As such, this work opens a practical avenue for the study of organic photovoltaics based on single crystals.
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
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
·
2021
·
IF 8.067
Xudong Qi,Kai Li,Enwei Sun,Bingqian Song,Da Huo,Jiaming Li,Xianjie Wang,Rui Zhang,Bin Yang,Wenwu Cao
Recently, the anomalous photovoltaic effect of ferroelectric materials has attracted considerable attention in the construction of efficient solar cells owing to the above-bandgap photovoltage of these materials. In this study, we investigate the anomalous photovoltaic effect of relaxor-based ferroelectric Pb(In 1/2 Nb 1/2 )O 3 -Pb(Mg 1/3 Nb 2/3 )O 3 -PbTiO 3 (PIMN-PT) ceramics with large remnant polarization and a narrow optical bandgap. Excellent photovoltaic performance with an ultrahigh open-circuit voltage of 23 V (575 V/cm) is achieved, which is higher than the open-circuit voltages of all reported polycrystalline materials with similar thickness. The phase structure, microstructure morphology, domain structure, ferroelectric and optical characteristics are analyzed, which could provide clues to the origin of the ultrahigh open-circuit voltage of PIMN-PT ceramics. The results suggest that the relaxor-based ferroelectric PIMN-PT system is a potential candidate for photovoltaic solar energy conversion devices.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Optical Materials
·
2024
·Vol. 12
·期 19
·2400193
·
IF 8
Dongying Fu,Yanli Ma,Zhuo Chen,Zuoming Hou,Junhua Luo
Lead-free hybrid perovskites (HPs) are considered as environmentally friendly photodetection materials. However, there are few studies on self-powered photodetection in lead-free HPs, and most of them are achieved through the introduction of chiral ammonium cations induced bulk photovoltaic effect (BPVE). Notably, enantiomeric pure chiral ammonium cations are difficult to synthesize, the quantity is small and the price is high. Therefore, choosing achiral ammonium cations to induce BPVE in lead-free HPs is crucial. Herein, achiral cations 1,3- bis (aminomethyl)cyclohexane (1,3-BMACH) is exploited to induce bulk photovoltaic through confinement effect in (1,3-BMACH)BiI 5 , then self-powered X-ray detection is successfully realized. Due to the large space in zero-dimensional (0 D) (MXD)BiI 5 (MXD is meta-xylylenediammonium), the confinement effect is not obvious, resulting in the disorderly arrangement of MXD 2+ cations and a centrosymmetry structure of (MXD)BiI 5 . Benefiting from the large photovoltage (1.0 V) of (1,3-BMACH)BiI 5 under X-ray, its single crystal devices exhibit ultra-high sensitivity of 170 µC Gy −1 cm −2 and extremely low detection limit of 49 nGy s −1 under self-powered mode, which almost surpassing most low-dimensional single-phase lead-free HPs at 0 V bias. This work has promoted the application of lead-free HPs in the field of self-powered X-ray detection.
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
Journal of Advanced Ceramics
·
2021
·Vol. 10
·期 5
·1119-1128
·
IF 6.707
Zhong Mingqiang,Feng Qin,Yuan Changlai,Liu Xiao,Zhu Baohua,Meng Liufang,Zhou Changrong,Xu Jiwen,Wang Jiang,Rao Guanghui
In this work, the (1− x )Bi 0.5 Na 0.5 TiO 3 - x BaNi 0.5 Nb 0.5 O 3 (BNT-BNN; 0.00 ⩽ x ⩽ 0.20) ceramics were prepared via a high-temperature solid-state method. The crystalline structures, photovoltaic effect, and electrical properties of the ceramics were investigated. According to X-ray diffraction, the system shows a single perovskite structure. The samples show the normal ferroelectric loops. With the increase of BNN content, the remnant polarization ( P r ) and coercive field ( E c ) decrease gradually. The optical band gap of the samples narrows from 3.10 to 2.27 eV. The conductive species of grains and grain boundaries in the ceramics are ascribed to the double ionized oxygen vacancies. The open-circuit voltage ( V oc ) of ∼15.7 V and short-circuit current ( J sc ) of ∼1450 nA/cm 2 are obtained in the 0.95BNT-0.05BNN ceramic under 1 sun illumination (AM1.5G, 100 mW/cm 2 ). A larger V oc of 23 V and a higher J sc of 5500 nA/cm 2 are achieved at the poling field of 60 kV/cm under the same light conditions. The study shows this system has great application prospects in the photovoltaic field.
研究领域:
材料科学
·
光电领域
✓ 已验证
产品关联
DOI
高影响因子
Nano Energy
·
2023
·
IF 17.6
Lei Shi,Ze Li,Wenyue Zhao,Zhao Wang,Yazhou Peng,Chang Gao,Wenjing Hua,Jie Wang,Xiaoxia Yang,Weidong Fei,Yu Zhao
Photovoltaic effects of single-layer films, with simple structure and low cost, are generally found in ferroelectric films , but their applications in solar cell are restricted by the large band gap of ferroelectrics . Here, we demonstrate a large photovoltaic effect can be obtained in paraelectric single-layer BiVO 4 (BVO) film based on the gradient distribution of charges. The circuit current density ( J SC ) and open circuit voltage ( V OC ) of the BVO film with best performance are 1.63 mA/cm 2 and 0.38 V, respectively. The J SC of BVO film kept 86% of the maximum value after continuous operation for 16 h. The high thermal stability of BVO is proved by long time operation and stable photovoltaic performance at high temperature. This work not only proposes a novel built-in electric field mechanism, but also indicates that the single-layer paraelectrics can be used as the next generation photovoltaic materials.
研究领域:
材料科学
·
能源科学
✓ 已验证
产品关联
DOI
高影响因子
InfoMat
·
2024
·Vol. 6
·期 4
·e12531
·
IF 22.7
Huiyu Dan,Hongyu Li,Lan Xu,Chong Guo,Chris R. Bowen,Ya Yang
Optoelectronic logic gates have emerged as one of the key candidates for the creation of next generation logic devices. However, current optoelectronic logic gates can provide only one or two logic gates, severely limiting their applications. Here we report a self-powered and mechanically flexible device based on a BaTiO 3 ferroelectric film to produce multi-modal logic gates. By exploiting the photo-induced photovoltaic and pyroelectric effects of a Schottky junction which is created between BaTiO 3 and LaNiO 3 , the device is able to provide five different optoelectronic logic gates, which can be operated using input lasers of different wavelength (405 or 785 nm). The mode of operation of the logic gate can be switched by controlling the wavelength and intensity of the input laser, where the switching process is both lossless and reversible. A logic gate array was designed to conduct the five logic operations, with 100% accuracy, thereby providing application potential for the Internet of Things, big data, and secure solutions for data processing and transmission.
研究领域:
材料科学
·
电子工程
·
光学工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）