Frontiers in Materials
·
2021
·
IF 3.515
Xu Yubing,Wang Xin,Zhao Jingda,Pan Yuzhu,Li Yuwei,Elemike Elias Emeka,Li Qing,Zhang Xiaobing,Chen Jing,Zhao Zhiwei,Akram Javed,Bae Byung Seong,Bin Suhaidi,Lei Wei
Recent years, organic-inorganic hybrid perovskites (OIHPs) have been widely used in applications, such as solar cells, lasers, light-emission diodes, and photodetectors due to their outstanding optoelectronic properties. Nowadays photodetectors based on perovskite films (PFs) suffer from surface and interface traps, which result from low crystalline quality of perovskite films and lattice mismatch between perovskite films and substrates. Herein, we fabricate MAPbI3 -(MA = CH3NH3) single-crystal films (SCFs) on MAPbBr3 single crystal substrates in MAPbI3 precursor solution during crystallization process via solution-processed epitaxy. Benefit from the good lattice matching, epitaxial MAPbI3 SCFs with high crystallinity and smooth morphology are of comparable quality to MAPbI3 PSCs and are of better quality than MAPbI3 polycrystalline films. Here we report that epitaxial MAPbI3 SCFs have a low trap density of 5.64×1011 cm–3 and a long carrier lifetime of 11.86 μs. In this work, photodetector based on epitaxial MAPbI3 single-crystal film (SCF) exhibits an excellent stability of a long-term stable response after 120 days, a fast response time of 2.21 μs, a high responsivity of 1.2 A W–1 and a high detectivity of 3.07 ×1012 jones.
研究领域:
材料科学
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光电技术
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半导体物理
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DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2020
·Vol. 30
·期 35
·2001478
·
IF 16.836
Cheng Cai,Yuan Teng,Jian-Hao Wu,Jun-Yan Li,Hong-Yan Chen,Jing-Hua Chen,Dai-Bin Kuang
Halide perovskite like methylammonium lead iodide perovskite (MAPbI 3 ) with its prominent optoelectronic properties has triggered substantial concerns in photocatalytic H 2 evolution. In this work, to attain preferable photocatalytic performance, a MAPbI 3 /cobalt phosphide (CoP) hybrid heterojunction is constructed by a facile in situ photosynthesis approach. Systematic investigations reveal that the CoP nanoparticle can work as co-catalyst to not only extract photogenerated electrons effectively from MAPbI 3 to improve the photoinduced charge separation, but also facilitate the interfacial catalytic reaction. As a result, the as-achieved MAPbI 3 /CoP hybrid displays a superior H 2 evolution rate of 785.9 µmol h −1 g −1 in hydroiodic acid solution within 3 h, which is ≈8.0 times higher than that of pristine MAPbI 3 . Furthermore, the H 2 evolution rate of MAPbI 3 /CoP hybrid can reach 2087.5 µmol h −1 g −1 when the photocatalytic reaction time reaches 27 h. This study employs a facile in situ photosynthesis strategy to deposit the metal phosphide co-catalyst on halide perovskite nanocrystals to conduct photocatalytic H 2 evolution reaction, which may stimulate the intensive investigation of perovskite/co-catalyst hybrid systems for future photocatalytic applications.
研究领域:
材料科学
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光化学
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催化
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能源材料
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产品关联
DOI
高影响因子
Laser & Photonics Reviews
·
2025
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IF 10
Dan Liu,Feiyi Liao,Haipeng Di,Haibin Li,Shujie Tie,Jiangfeng Song,Lin Lei,Changan Chen
Lead halide perovskite wafers, which have adjustable size and thickness, are promising for the tailored fabrication of X-ray detectors. However, common voids and grain boundaries, acting as carrier traps in polycrystalline wafers, present a major challenge to achieving optimal optoelectronic properties. Herein, an innovative approach is adopted by introducing methylammonium thiocyanate (MASCN) vapor into the hot-pressing environment of MAPbI 3 wafers, promoting perovskite grain merging and growth. The resulting compact wafers with larger crystal grains display an extended average carrier lifetime ( τ avg ) of 31.61 ns, a high ion activation energy ( E a ) of 0.47 eV, a reduced dark current drift ( I drift ) of 4.11 × 10 −4 nA cm −1 s −1 V −1 , and an improved mobility-lifetime product ( µτ ) of 8.26 × 10 −4 cm 2 V −1 . These optimized MAPbI 3 wafer-based detectors achieve a high sensitivity of 16611 µC Gy air −1 cm −2 , a low detection limit (LoD) of 47.5 nGy air s −1 , and robust operational stability in X-ray detection. Furthermore, these detectors exhibit excellent X-ray imaging capability, achieving a high spatial resolution of 5.64 lp mm −1 . Therefore, the deployment of volatile thiocyanate salt during hot pressing provides a novel strategy for engineering high-quality polycrystalline perovskite wafers, propelling forward the field of X-ray detection.
研究领域:
材料科学
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电子工程
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医学影像
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2020
·
IF 8.758
Tao Wang,Gang Lian,Liping Huang,Fei Zhu,Deliang Cui,Qilong Wang,Qingbo Meng,Ching-Ping Wong
Perovskite single-crystal (SC) or quasi-single-crystal (QSC) films are promising candidates for excellent performance of photoelectric devices. However, it is still a great challenge to fabricate large-area continuous SC or QSC films with proper thickness. Herein, we propose a pressure-assisted high-temperature solvent-engineer (PTS) strategy to grow large-area continuous MAPbI3 QSC films with uniformly thin thickness and orientation. Dramatic grain growth (∼100 μm in the lateral dimension) and adequate boundary fusion are realized in them, vastly eliminating the grain boundaries. Thus, remarkable diminution of the trap density (ntrap: 7.43 × 1011 cm–3) determines a long carrier lifetime (τ2: 1.7 μs) and superior photoelectric performance of MAPbI3-based lateral photodetectors; for instance, an ultrahigh on/off ratio (>2.4 × 106, 2 V), great stability, fast response (283/306 μs), and high detectivity (1.41 × 1013) are achieved. The combination properties and performance of the QSC films surpass most of the reported MAPbI3. This effective approach in growing perovskite QSC films points out a novel way for perovskite-based optoelectronic devices with superior performance.
研究领域:
材料科学
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光电设备
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半导体物理
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产品关联
DOI
PubMed
高影响因子
DALTON TRANSACTIONS
·
2023
·Vol. 52
·期 43
·15974-15985
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IF 4
Pengyun Zhang,Jie Xiong,Wei-Hsiang Chen,Pingfan Du,Lixin Song
In recent years, air-processed MAPbI3 perovskite solar cells (PSCs) have attracted widespread interest from researchers worldwide because of their simple and low-cost fabrication process. Nonetheless, the ambient conditions usually bring about many adverse effects, such as imperfect crystallization and numerous defects in perovskite films, which seriously impact both the photoelectric performance and stability of the device. Therefore, in this work, a polymer dual-passivation strategy was employed by introducing ammonium polyphosphate (APP) as an additive to the green anti-solvent to accurately modify the perovskite layer. APP, which has abundant phosphate and ammonium groups, could simultaneously fill the I/Pb vacancies by Lewis acid–base reactions to restrain defect formation and improve the power conversion efficiency (PCE) of the ultimate device. On the other hand, the long molecular chains of the polymer with a certain flexural ability were easily congregated at the grain boundaries of the perovskite grains, thus enhancing the bending resistance. Consequently, high-quality perovskite films with a dense morphology and large grain size were obtained. Because of the reduced defect density and suppressed non-radiative recombination, the optimal PSC attained a champion PCE of 20.87% with negligible hysteresis. Furthermore, the non-encapsulated APP-modified flexible device also exhibited excellent bending resistance. Only 20% of its normalized PCE was lost after 150 bending cycles at room temperature. This simple, green, low-cost, and reliable strategy for preparing high-efficiency PSCs with good stability can facilitate its commercialization.
研究领域:
材料科学
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太阳能技术
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化学工程
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产品关联
DOI
PubMed
高影响因子
ACS Applied Energy Materials
·
2020
·
IF 4.473
Jianxu Ding,Lin Jing,Ye Yuan,Jie Zhang,Qing Yao,Kaiyu Wang,Weiwei Zhang,Haiqing Sun,Bing Liu,Tianliang Zhou,Xiaoyuan Zhan
The optoelectronic performances of MAPbI3 are related to film morphology and crystal orientation. However, it is difficult to directly quantify the optoelectronic anisotropy in thin films because controlling growth-oriented grains and measuring the optoelectronic difference within micro–nono regions have great technological challenges. Here, taking advantages of the pseudo-cubic morphology of MAPbI3 single crystals (SCs) exposed with (110), (002), and (200) facets, the optoelectronic anisotropies are compared. It reveals that the periodic positive and negative potential distributions at the outermost (110) surface, the orientations of MA+ dipoles, and the stacking of PbI6 octahedrons ensure (110) planes have lower defect densities (VI+, VMA–, I–, MA+, or Ii–, etc.), which therefore enhance photo recycling, deduce the dark current, and increase the photocurrent. Besides, the periodic MA+ and I– arrangements at the (110) surface also restrict ion migrations compared to those of (200) planes. In addition, by comparing the optoelectronic properties of (200) planes of the pseudo-cubic and rhombic dodecahedral MAPbI3 SCs, it is found that the room-temperature-grown pseudo-cubic MAPbI3 SC possesses lower intrinsic defect densities and thus enhances the photo response.
研究领域:
材料科学
·
光电材料
✓ 已验证
DOI
高影响因子
ACS Applied Nano Materials
·
2023
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IF 5.9
Zeren He,Yan Yang,Jiaxin Liu,Junyu Li,Xingyu Lu,Jikuang Zou,Shuai Yang,Yousheng Zou
Nowadays, halide perovskites have drawn extensive attention as active layers in the field of photodetectors (PDs) attributed to their optoelectric properties. However, the numerous defects in the prepared films and the lack of response in the near-infrared (NIR) range due to the intrinsic band gap limitation severely restrict the performances and applications of perovskite photodetectors. With this in mind, we introduced diethyl ether as a counter-solvent to improve the quality of the peroxide films. After comparison with chlorobenzene (CB), toluene (ToL), and ethyl acetate (EA), the mechanism by which diethyl ether (DE) as an antisolvent improves the quality of the films was explored. MAPbI3 films and lead sulfide (PbS) quantum dots (QDs) were then combined to achieve a visible (VIS)–near-infrared response. The resultant PD, with the structure of ITO/NiOx/PbS QDs/MAPbI3/PC61BM/Ag, exhibits an ultrabroad response from 300 to 1100 nm and presents high detectivity reaching 5.6 × 1011 and 6.5 × 1010 Jones in the VIS and NIR regions, respectively. The fast response time in the microsecond range and the response bandwidth of 10 kHz (f–3 dB) are comparable or even superior to counterparts. In addition, this approach provides ideas for the development of high-performance broadband perovskite-based optoelectronic devices.
研究领域:
材料科学
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光电子学
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半导体物理
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2025
·
IF 5.1
Dong Liu,Yuxin Li,Dalin Li,Bin Lu,Zheng Guo,Qian Chen,Xiaojing Zhang,Yaxue Wang,Tao He
Although crystallographic engineering of perovskite single crystals offers a promising route to optimize optoelectronic performance, the intrinsic charge transport mechanisms governing facet-dependent anisotropy remain poorly understood. Herein, we resolve this issue through comparative analysis of stoichiometry-controlled MAPbI3 single crystals with dominant (100) and (001) facets. The PbI2-terminated (001) facet achieves enhanced atmospheric stability via oxygen-mediated passivation and reduced hydration susceptibility, contrasting sharply with the air-sensitized MAI-dominated (100) surface. Bulk characterization further identifies 18% higher mechanical hardness and 15% lower trap density in (001)-oriented crystals compared to (100) counterparts. Synergistically, the (001) facet exhibits an 18% elevated ion migration activation energy (0.59 eV) and superior Hall effect mobility (7.3 cm2V-1s-1 at 180 K), surpassing (100) by 1.55 ×. Temperature-dependent field-effect transistors corroborate this anisotropy, yielding a peak mobility of 14.7 cm2V-1s-1 for (001) versus 8.3 cm2V-1s-1 for (100). Our findings establish crystallographic orientation as a pivotal design parameter, with PbI2-terminated (001) facets offering atomic-scale insights for advancing high-efficiency perovskite optoelectronics.
研究领域:
材料科学
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凝聚态物理
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半导体物理
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晶体工程
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光电子学
✓ 已验证
产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2025
·
IF 6.3
Wenxiang Zhou,Shaojie Hong,Fanhua Yu,Jinlin Wan,Qinming Wang,Xingfu Zhou
In recent years, the development of hole-conductor-free printable mesoscopic perovskite solar cells (PMPSCs) based on carbon electrodes has been observed with considerable rapidity. The high stability and potential scalability of these cells have made them attractive options for researchers in the field. However, the perovskite solution has a high permeability resistance in the deep oxide scaffold. Here, we show that the cooperation of hybrid carbon doped with NiO electrode and differential pressure driven MAPbI 3 crystal (DPDC) growth can effectively increase the hole extraction capability and effectively increase the perovskite loading amount in the oxide scaffold layer. Consequently, the power conversion efficiency (PCE) of the best-performing PMPSCs fabricated using hybrid carbon electrode and DPDC reached 11.82 %, showing a 15.43 % increase in the PCE when compared with the ordinary devices. After 1000 h in ambient air conditions with a relative humidity of 30–70 %, the PMPSCs can still maintain 85 % of the initial PCE.
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
CHEMISTRY OF MATERIALS
·
2022
·
IF 10.508
Lu Zi,Wen Xu,Rui Sun,Zeming Li,Jingwei Zhang,Le Liu,Nan Wang,Yue Wang,Nan Ding,Junhua Hu,SiYu Lu,Hancheng Zhu,Hongwei Song
Multi-mode photodetectors made from perovskite single crystals (SCs) are attracting great interest with the ability to extract spectral information from different wavebands. However, it still remains a huge challenge to obtain perovskite SC photodetectors capable of multi-mode response. Here, we present successful doping of various lanthanide ions (Ce3+, Pr3+, Nd3+, Eu3+, Tb3+, Er3+, Yb3+, and Yb3+/Er3+ pairs) into the lattices of organic–inorganic MAPbI3 perovskite SCs through a modified solution crystallization method. In lanthanide-ion-doped MAPbI3 SCs, the dual-mode luminescence (down-shifting and upconversion) spanning from visible to near-infrared (NIR) emissions and significantly improved electrical properties are obtained. Multi-mode photodetectors for the sensitive visible light, NIR light, and X-ray detection are developed based on MAPbI3:Yb3+, Er3+ SCs. In contrast to pristine MAPbI3 SC photodetectors, MAPbI3:Yb3+, Er3+ SC photodetectors exhibit a high detectivity of 3.8 × 1012 Jones for broadband (350–850 nm) and 1.1 × 1011 Jones for two NIR bands (980 nm, 1540 nm) and a sensitivity of 1.16 × 106 μCGyair–1 cm–2 for X-ray detection. Our work inherits the advantages of lanthanide ions and perovskite SCs, offering an attractive option for new optoelectronic applications.
研究领域:
材料科学
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光电子学
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光子学
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半导体物理
✓ 已验证
产品关联
DOI
高影响因子
Coatings
·
2024
·Vol. 14
·期 5
·633
·
IF 2.9
Xueqiong Su,Ruimin Wang,Huimin Yu,Jin Wang,Ruixiang Chen,He Ma,Li Wang
Although perovskite has great potential in optoelectronic devices, the simultaneous satisfaction of material stability and high performance is still an issue that needs to be solved. Most perovskite optoelectronic devices use quantum dot spin coating or the gas-phase growth of perovskite thin films as the photoelectric conversion layer. Due to stability limitations, these materials often experience a significant decrease in photoelectric conversion efficiency when encountering liquid reagents. The self-assembled growth of hybrid perovskite crystals determines superior lattice ordering and stability. There are three types of ionic liquids—[Emim]BF4, EMIMNTF2, and HMITFSI—that can effectively enhance the X-ray photoelectric conversion performance of hybrid perovskite crystal CH3NH3PbI3(MAPbI3), and the enhancement in the photocurrent leads to an improvement in the sensitivity of X-ray detectors. We soak the perovskite crystals in an ionic liquid and perform two treatment methods: electrification and dilution with ETOH solution. It is interesting to find that MAPbI3perovskite single crystal materials choose the same optimized ionic liquid species in X-ray detection and photovoltaic power generation applications, and the effect is quite the opposite. Compared with untreated MAPbI3crystals, the average photocurrent density of Electrify-HMITFSI MAPbI3increased by 826.85% under X-ray excitation and the sensitivity of X-ray detectors made from these treated MAPbI3crystals significantly increased by 72.6%, but the intensity of the PL spectrum decreased to 90% of the untreated intensity.
研究领域:
材料科学
·
光电子学
·
光伏
·
辐射探测
✓ 已验证
产品关联
DOI
高影响因子
APPLIED SURFACE SCIENCE
·
2018
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IF 4.439
Lele Qiu,Yulin Yang,Guohua Dong,Debin Xia,Mengru Li,Xiao Fan,Ruiqing Fan
As for the solution-processed MAPbI 3 film, the pinholes and gaps are an inevitable and undesirable phenomenon, which can usually lead to serious interface charge recombination due to the penetration of hole transport materials in perovskite solar cells (PSCs). Herein, a hydrophobic β-NaYF 4 :Yb,Er up-conversion ultrathin layer with particle size ca. 6 nm was first applied to modify the MAPbI 3 film for optimizing the surface of perovskite film. Thereby, the corresponding PSCs yield a significantly enhanced power conversion efficiency of 15.17% compared with that (13.32%) of the pristine PSCs. Furthermore, the PSCs also have a good stability in air atmosphere (relative humidity ≤45%) because of the introduction of this hydrophobic material. After a series of detailed investigations and comparison, it can be easily concluded that the filled pinholes and gaps in perovskite films via β-NaYF 4 :Yb,Er nanoparticles is the main reason for the performance enhancement of the β-NaYF 4 :Yb,Er based PSCs, which can result in an enhanced hole extraction efficiency and reduced interface charge recombination. As a conclusion, it is a feasible and effective approach for improving the photovoltaic performance of PSCs by filling up the pinholes and gaps in perovskite films with up-conversion ultrathin layers.
研究领域:
材料科学
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能源科学
·
纳米技术
✓ 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）