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
MATERIALS CHEMISTRY AND PHYSICS
·
2017
·
IF 2.084
Jianxu Ding,Songjie Du,Xiaohua Cheng,Lin Jing,Ying Zhao,Zhiyuan Zuo,Hongzhi Cui,Xiaoyuan Zhan
Organic-inorganic hybrid methylammonium lead iodide perovskite (MAPbI 3 ) is considered as new generation optoelectronic material. MAPbI 3 single crystal is proved more excellent than its polycrystalline film and nano state counterparts, though the discrepancy is still pending. Referring MAPbI 3 single crystal applications, physical anisotropy stands in its breach. However, it has not been drawn enough attentions till now. In this study, taking advantages of the natural exposed (100) and (112) facets of MAPbI 3 single crystal grown from γ-butyrolactone (GBL) solution, the anisotropic optoelectronic performances based on of these two lattice planes were systematically explored through planar metal-semiconductor-metal (MSM) devices. An order enhanced photocurrents , 135% increased responsivity, and 128% heightened EQE on (112) plane device than those on (100) plane device under 5 V bias with irradiation power of 1 mW, remarkably demonstrated that (112) plane was more excellent in optoelectronic performances and light harvesting capability.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
Nanoscale
·
2023
·Vol. 15
·期 14
·6664-6672
·
IF 6.7
Wei Qian,Weitao Qiu,Shanshan Yu,Duan Huang,Renbo Lei,Xianzhen Huang,Shuang Xiao,Xinwei Wang,Shihe Yang
The emergence of organic–inorganic hybrid perovskites with a high μτ product and a high absorption coefficient has made it possible to adopt an aerosol–liquid–solid technology for direct X-ray detectors. The film quality from the ALS process is often compromised, especially on the film surface, when deposited in ambient conditions with uncontrolled humidity. Herein we develop a solvent engineering strategy in the ALS process to obtain high-quality MAPbI3 thick films. The key is the introduction of a molecular additive to intervene and regulate the perovskite crystallization process so that the negative effect of the ALS ambience is minimized. This strategy allows us to prepare direct X-ray detectors with much reduced dark current, enhanced response speed and improved overall performance.
研究领域:
材料科学
·
物理学
·
医学成像技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Jie Zhang,Kaiyu Wang,Qing Yao,Ye Yuan,Jianxu Ding,Weiwei Zhang,Haiqing Sun,Chenyu Shang,Changqian Li,Tianliang Zhou,Shuping Pang
MAPbI3, one of the archetypical metal halide perovskites, is an exciting semiconductor for a variety of optoelectronic applications. The photoexcited charge-carrier diffusion and recombination are important metrics in optoelectronic devices. Defects in grain interiors and boundaries of MAPbI3 films cause significant nonradiative recombination energy losses. Besides defect impact, carrier diffusion and recombination anisotropy introduced by structural and electronic discrepancies related to the crystal orientation are vital topics. Here, large-sized MAPbI3 single crystals (SCs) were grown, with the (110), (112), (100), and (001) crystal planes simultaneously exposed through the adjusting ratios of PbI2 to methylammonium iodide (MAI). Such MAPbI3 SCs exhibit a weak n-type semiconductor character, and the Fermi levels of these planes were slightly different, causing a homophylic p–n junction at crystal ledges. Utilizing MAPbI3 SCs, the photoexcited carrier diffusion and recombination within the crystal planes and around the crystal ledges were investigated through time-resolved fluorescence microscope. It is revealed that both the (110) and (001) planes were facilitated to be exposed with more MAI in the growth solutions, and the photoluminescence (PL) of these planes manifesting a red-shift, longer carrier lifetime, and diffusion length compared with the (100) and (112) planes. A longer carrier diffusion length promoted photorecycling. However, excessive MAI-assisted grown MAPbI3 SCs could increase the radiative recombination. In addition, it revealed that the carrier excited within the (001) and (112) planes was inclined to diffuse toward each other and was favorable to be extracted out of the grain boundaries or crystal ledges.
研究领域:
材料科学
·
光学
·
半导体物理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Chinese Physics B
·
2023
·Vol. 32
·期 1
·017901
·
IF 1.7
Siwen You,Ziyi Shao,Xiao Guo,Junjie Jiang,Jinxin Liu,Kai Wang,Mingjun Li,Fangping Ouyang,Chuyun Deng,Fei Song,Jiatao Sun,Han Huang
Hybrid organic–inorganic perovskite thin films have attracted much attention in optoelectronic and information fields because of their intriguing properties. Due to quantum confinement effects, ultrathin films in nm scale usually show special properties. Here, we report on the growth of methylammonium lead iodide (MAPbI3) ultrathin films via co-deposition of PbI2 and CH3NH3I (MAI) on chemical-vapor-deposition-grown monolayer MoS2 as well as the corresponding photoluminescence (PL) properties at different growing stages. Atomic force microscopy and scanning electron microscopy measurements reveal the MoS2 tuned growth of MAPbI3 in a Stranski–Krastanov mode. PL and Kelvin probe force microscopy results confirm that MAPbI3/MoS2 heterostructures have a type-II energy level alignment at the interface. Temperaturedependent PL measurements on layered MAPbI3 (at the initial stage) and on MAPbI3 crystals in averaged size of 500 nm (at the later stage) show rather different temperature dependence as well as the phase transitions from tetragonal to orthorhombic at 120 and 150 K, respectively. Our findings are useful in fabricating MAPbI3/transition-metal dichalcogenide based innovative devices for wider optoelectronic applications.
研究领域:
材料科学
·
光学
·
物理化学
✓ 已验证
DOI
高影响因子
CRYSTENGCOMM
·
2023
·Vol. 25
·期 22
·3271-3277
·
IF 3.1
Yudan Chen,Wenjun Huang,Xiangfeng Wei,Panpan Li,Zain Fatima,Rulong Zhou,Jiehua Liu
It is a challenge to synthesize high-quality MAPbX3 single-crystal microwires (MWs) under gentle conditions owing to their sensitivity to humidity and brittleness. We herein propose a facile bilayer flexible polymer confinement method to obtain high-quality MAPbI3 single-crystal microwires in air. The MAPbI3 microwire-based photodetector exhibits a superior responsivity of 77.96 A W−1, an EQE of 1.86 × 104%, and an ultrahigh detectivity of 6.97 × 1013 Jones owing to the efficient carrier transport and excellent crystallinity with few defects. Furthermore, photodetectors based on the MAPbI3 microwire arrays present superior performance with a detectivity of 3.09 × 1013 Jones, which is more than 160% and 7700% higher than that of the photodetectors based on the MAPbI3 microwires and polycrystalline film at 254 μW cm−2.
研究领域:
材料科学
·
光电材料
✓ 已验证
产品关联
DOI
高影响因子
Materials
·
2023
·Vol. 16
·期 17
·6064
·
IF 3.4
Menghan Duan,Yunpeng Wang,Pingli Zhang,Luchao Du
Organic inorganic perovskite materials have received increasing attention in the optoelectronic field because of their unique properties. The ultrafast dynamics of photogenerated carriers determine photoelectric conversion efficiency, thus, it is feasible to influence the dynamics behavior of photogenerated carriers by regulating A-site cations. This paper mainly used transient absorption spectra (TAS) technology to study the photogenerated carriers relaxation processes of organic–inorganic perovskite CsxMA1−xPbI3materials at different x values. Three sets of time constants were obtained by global fitting at different values of x. The experimental results showed that the crystal structure of perovskite could be affected by adjusting the Cs+doping amount, thereby regulating the carrier dynamics. The appropriate amount of A-cation doping not only maintained the organic–inorganic perovskite crystal phase, but also prolonged the photogenerated carrier’s lifetime. The 10% Cs+doping CsxMA1−xPbI3perovskite has potential for solar cell applications. We hope that our research can provide dynamics support for the development of organic–inorganic perovskite in solar cells.Keywords:Cs+doping MAPbI3perovskite;transient absorption spectra;crystal structure;carriers dynamics
研究领域:
材料科学
·
光电子学
·
太阳能电池研究
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Scientific Reports
·
2015
·Vol. 5
·期 1
·1-10
·
IF 5.578
Lian Zhipeng,Yan Qingfeng,Lv Qianrui,Wang Ying,Liu Lili,Zhang Lijing,Pan Shilie,Li Qiang,Wang Liduo,Sun Jia-Lin
Recently, the discovery of organometallic halide perovskites provides promising routes for fabricating optoelectronic devices with low cost and high performance. Previous experimental studies of MAPbI 3 optoelectronic devices, such as photodetectors and solar cells, are normally based on polycrystalline films. In this work, a high-performance planar-type photodetector fabricated on the (100) facet of a MAPbI 3 single crystal is proposed. We demonstrate that MAPbI 3 photodetector based on single crystal can perform much better than that on polycrystalline-film counterpart. The low trap density of MAPbI 3 single crystal accounts for the higher carrier mobility and longer carrier diffusion length, resulted in a significant performance increasement of MAPbI 3 photodetector. Compared with similar planar-type photodetectors based on MAPbI 3 polycrystalline film, our MAPbI 3 single crystal photodetector showed excellent performance with good stability and durability, broader response spectrum to near-infrared region, about 10 2 times higher responsivity and EQE and approximately 10 3 times faster response speed. These results may pave the way for exploiting high-performance perovskites photodetectors based on single crystal.
研究领域:
材料科学
·
光电技术
✓ 已验证
DOI
PubMed
高影响因子
PHYSICA B-CONDENSED MATTER
·
2022
·
IF 2.988
Jianhua Li,Xilin Zhang,Zhifang Zhang,Tianxiao Liu,Lei Chen,Zhiyong Liu
The development of perovskite solar cells has improved rapidly. However, PSCs generally suffer from instability, due to the detrimental defects. Additive engineering is a favorable method for defect passivation. In this work, the linear pseudo-halogen salt, KSCN, is introduced into the MAPbI 3 perovskite film to improve the performance of PSC. The trap density of cells with SCN − is decreased significantly. The SCN − not only can fill halogen vacancies to reduce the halide-related defects, but also can interact with the uncoordinated Pb 2+ via coordinate bond to stabilize perovskite lattice structure. Moreover, the performance of devices with other linear pseudo-halogen anions (OCN − , SeCN − ) are also investigated. Due to the improved short circuit current density, the power conversion efficiency of devices increases from 18.02% (PVK) to 20.41% (PVK–SCN - ), 19.53% (PVK–OCN - ) and 19.23% (PVK–SeCN - ), respectively. After introducing pseudo-halide anions, the devices showed robust stability under the ambient environment.
研究领域:
材料科学
·
能源技术
✓ 已验证
产品关联
DOI
高影响因子
OPTICAL MATERIALS
·
2024
·
IF 3.8
Shijie Du,Xicai Lai
CH₃NH₃PbI₃ (MAPbI₃) perovskites have demonstrated significant potential in optoelectronic devices. However, the stability and performance of these applications are critically influenced by electric fields and light soaking effect (LSE). The mechanisms by which these factors affect the photoluminescence (PL) and time-resolved photoluminescence (TRPL) characteristics of MAPbI₃ thin films are not yet fully understood. In this study, we constructed a symmetric lateral electrode structure (ITO/MAPbI₃/ITO) to systematically analyze the impact of varying electric field strengths and LSE wavelengths on the PL and TRPL characteristics of MAPbI₃ thin films. Our experimental results reveal that bias voltage significantly influences carrier recombination processes and transfer rates. Both forward and reverse bias voltages exhibit similar effects on the symmetric lateral electrode ITO/MAPbI 3 /ITO structure. As the bias voltage increases, the steady-state PL intensity of MAPbI 3 films decreases, and the TRPL decay time shortens. Additionally, our studies on different LSE indicate that higher photon energy has a more pronounced impact on the TRPL lifetime of MAPbI 3 films. This research elucidates the mechanisms by which electric fields and LSE affect the photophysical properties of MAPbI 3 perovskite films, providing new insights for optimizing the performance of these materials in optoelectronic devices.
研究领域:
材料科学
·
光学
·
光伏技术
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2023
·
IF 5.2
Mang Li,Xueying Zhao,Peng Tang,Xuyang Zhang,Yufei Wu,Tengfei Jin,Rongxiu Liu,Guohua Wu,Xiangwei Wang
Perovskite shines as a top contender in the realm of electromagnetic waves (EMW) absorption, owing to its unique physical properties, structural characteristics, and multifunctionality. However, it is still a huge challenge to synthesize high-performance EMW absorbing perovskite materials with environmental-friendly and sustainable processes, despite the simplicity of the perovskite preparation procedures. To address this issue, a facile solvent-free method was developed in this study for CH 3 NH 3 PbI 3 (MAPbI 3 ), then introduced carbon nanotubes (CNTs) and subsequently prepared MAPbI 3 /CNTs (MC) composites using a simple procedure. The frequency, thickness, reflection loss (RL), and effective absorption bandwidth (EAB) of MC for EMW absorption were systematically investigated by adjusting the filling amount and component ratio of MC. It is interesting to find that the as-prepared MC composites always achieve high absorption intensities in X and Ku bands. Moreover, an appropriate amount of CNTs can further optimize the impedance matching of MC and promote the loss capability of MAPbI 3 .With a loading ratio of 25 wt% and a mass ratio of 2:1 between MAPbI 3 and CNTs, the MC sample exhibits excellent absorption capability, achieving the lowest RL of −63.8 dB at 1.8 mm and the maximum EAB of 5.16 GHz at 1.69 mm. These findings contribute to the design and development of organic-inorganic halide perovskite absorbers with superior EMW absorption performances.
研究领域:
材料科学
·
电磁学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Electronic Materials
·
2021
·Vol. 7
·期 3
·2001003
·
IF 7.295
Zuoxiang Xie,Kai Feng,Yan Xiong,Xu Chen,Yudong Liang,Kamran Abid,Ling Xu
In recent years, organic–inorganic hybrid halide perovskite materials have been found to have low thermal conductivity and a large Seebeck effect, giving them great potential for thermoelectric applications. More stable single crystals make this possible. In this work, high-quality MAPbI 3 single crystals are prepared using a modified solvent engineering method, and their trap density is as low as 2.5 × 10 9 cm −3 . It is noticed that the reaction between the crystal a metal electrode causes different degrees of doping effect along the vertical direction, leading to an increase in the intrinsic P-type with Au metal, and forming N-type semiconductor characteristics with Ag metal. A high Seebeck voltage thermoelectric module is obtained by combining the perovskite single crystal with different conductive characteristics. After device optimization, the thermoelectric potential of the champion module reaches a high voltage of 337 mV at 115 °C, the maximum output power with load reaches about 30 nW, and the theoretical maximum power reaches 65 nW. It is hoped that this research can promote the development of low thermal conductivity perovskite materials in the thermoelectric field.
研究领域:
材料科学
·
能源技术
·
物理学
✓ 已验证
DOI
高影响因子
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