Journal of Energy Chemistry
·
2017
·
IF 2.594
Yunxia Zhang,Yucheng Liu,Zhou Yang,Shengzhong (Frank) Liu
Organic–inorganic single-crystalline perovskites have attracted significant attentions due to their exceptional progress in intrinsic properties’ investigation and applications in photovoltaics and optoelectronics . In this study, the large perovskite CH 3 NH 3 PbI 3 single crystal with the largest length of 80 mm was prepared through the method of inverse-temperature crystallization. Meanwhile, the mass production of integrate photodetectors have been fabricated on the single-crystalline wafer and the photoresponse performances were investigated. The results show that the single-crystalline photodetectors have broad spectrum response to 900 nm, rapid response speed (<40 µs) and excellent stability. These findings are of great importance for future promising perovskite single crystalline for integrated photoelectronic application.
研究领域:
材料科学
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光电技术
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry C
·
2024
·
IF 5.7
Xiaohui Lu,Xiandong Zhao,Congcong Wu,Shiming Wang,Yanyan Li,Xiaojie Yang,Yang Li,Li Zhao
Interfacial defects between the perovskite layer and the adjacent charge transport layer play a crucial role in enhancing the power conversion efficiency (PCE) and stability of organic–inorganic halide perovskite solar cells. In this study, we employed a transition metal-containing selenide (NiSe) to modify the interface between the electron transport layer and the perovskite layer. Ni2+ as a transition metal exhibits a strong propensity for forming octahedral complexes with halide ions, thereby providing a favorable substrate for perovskite crystallization. This significantly contributes to the reduction of defect densities and the fabrication of high-quality perovskite thin films. Our findings indicate that the grain size of the perovskite films markedly increased upon modification with 0.4 mg mL−1 NiSe, resulting in a reduction of defect density from 2.175 × 1016 cm−3 to 1.485 × 1016 cm−3. Furthermore, the PCE of the NiSe-modified device, at a concentration of 0.4 mg mL−1, reached 14.85%, a significant improvement compared to that of the unmodified device (12.14%). These results offer a novel approach to fabricate perovskite films with enhanced crystallinity and reduced trap density.
研究领域:
材料科学
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太阳能电池技术
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产品关联
DOI
高影响因子
SOLAR ENERGY
·
2021
·
IF 5.742
Yujiao Li,Pin Lv,Chen Li,Fan Xu,Jinbiao Jia,Bingqiang Cao
Traditional P-i-N perovskite solar cells have achieved high efficiency over 25%, but the device structure is relatively complex, and generally requires expensive low-conductivity p-type organic semiconductors as hole transport materials. As a typical semiconductor, it is very important to realize the bipolar doping of methylamine lead iodine (CH 3 NH 3 PbI 3 ) that is the light-absorbing layer of perovskite solar cell. Also, it is significant to develop perovskite cells with new device structure. Here, we chose lithium iodide (LiI) as the dopant and successfully grow p-type Li + doped CH 3 NH 3 PbI 3 (MAPbI 3 :Li) perovskite films with low resistivity (10 3 Ω•cm). The temperature-dependent photoluminescence, Hall effect and Kelvin probe force microscope (KPFM) results strongly confirmed that Li + doping promotes the transformation of pristine weak n-type MAPbI 3 to intentionally doped p-type film. Subsequently, the p-type MAPbI 3 film is used as both the light absorption layer and hole transport layer, and form a PN heterojunction with n-type titanium dioxide (TiO 2 ), which is used as the electron transport layer, to construct the heterostructural perovskite cell with a photoelectric conversion efficiency (PCE) of 10.43%. The electron beam induced current (EBIC) signal also strongly confirms the existence of the PN heterojunction and the new working mechanism of such new solar cells.
研究领域:
材料科学
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能源技术
✓ 已验证
产品关联
DOI
高影响因子
Advanced Materials Interfaces
·
2020
·Vol. 7
·期 14
·2000197
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IF 4.948
Nuo Lei,Lu Pan,Tao Ye,Shuang Chen,Xi Wang
The recent studies widely believe that the stability of (PEA) 2 PbI 4 /MAPbI 3 perovskite solar cells (PSCs) can be progressively increased with the addition of phenethylammonium ion (PEA + ). Herein, it is reported on the stability variations after the addition of PEA + into the MAPbI 3 film and it is demonstrated that excess PEA + has negative effect on the stability of (PEA) 2 PbI 4 /MAPbI 3 perovskite film. X-ray photoelectron spectroscopy, nuclear magnetic resonance, and X-ray absorption fine structure spectroscopy are utilized to testify that the excess PEA + damages the MAPbI 3 crystal structure and generates defects due to the strong coordination between NH 3 + from PEA + and I − from [PbI 6 ] 4− . This work reveals that the stability of (PEA) 2 PbI 4 /MAPbI 3 perovskite films is not proportional to the addition of PEA + , which is of interest for the developing of stable 2D/3D PSCs.
研究领域:
材料科学
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化学
✓ 已验证
DOI
高影响因子
Journal of Physical Chemistry Letters
·
2017
·
IF 9.353
Jianxu Ding,Lin Jing,Xiaohua Cheng,Ying Zhao,Songjie Du,Xiaoyuan Zhan,Hongzhi Cui
MAPbI3 is deemed as the most prominent member in hybrid perovskites family because of its extremely optoelectronic properties. However, some issues and puzzles are still in expectation of their answers, such as stabilities, hysteresis, ferroelectricity, and so on. To bridge the distinctions between MAPbI3 single crystal and thin films, large-size single crystals are demanded. On the contrary, crystal structure anisotropy-dependent optoelectronic properties is an inevitable topic. A series of large-size MAPbI3 single crystals with (220) facets exposed were successfully grown, using high concentration solutions and large-size seed crystals to match growth rates of (100) and (220) facets. The optoelectronic properties of photocurrents, responsivity, EQE, and detectivity clearly showed significant anisotropy of optoelectronic properties in MAPbI3 single crystal. According to ion migration theory, the anisotropy of optoelectronic properties was interpreted. We hope this result will be helpful to guide oriented growth MAPbI3 thin films.
研究领域:
材料科学
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光电子学
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晶体生长
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半导体物理
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
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IF 8.2
Zuhong Li,Jinguo Cao,Xiaojie Yang,Duoling Cao,Yanyan Li,Li Zhao,Shimin Wang
Carrier recombination, which arises from defects present at both the buried interface and throughout the bulk phase, hinders performance improvement in perovskite solar cells (PSCs). Nonetheless, the current strategies still face some pressing issues. Herein, we demonstrate a novel synergistic strategy of carbon nitride (C3N3) as a buried modified layer and a perovskite antisolvent additive to reduce energy loss resulting from nonradiative recombination. C3N3 functions serve as an interfacial modification layer that enhances electron mobility, improves interface contacts, and matches energy levels between SnO2 and perovskite. Meanwhile, C3N3 acts as an antisolvent additive in the perovskite layer, reducing defect density and modulating the energy level, which boosts both the efficiency and moisture stability of PSCs. Consequently, the target devices achieve a remarkable power conversion efficiency of 21.43%, with unencapsulated devices retaining 90% of their initial value after operating 1000 h. These integrated strategies provide a promising method for simultaneously reducing interfacial and bulk defects, with potential application in other photoelectronic devices.
研究领域:
光伏技术
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材料科学
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可再生能源
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半导体器件
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纳米材料
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry A
·
2020
·Vol. 8
·期 27
·13585-13593
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IF 11.301
Xi Yuan Feng,Kar Wei Ng,Shuang Peng Wang,Wen Zhou Chen,Zhen Zhong Zhang,Wei Chen,Yun Yang Zhao,Bao Tu,Zi Kang Tang,Hui Pan,Zhu Bing He
The amine-induced very fast liquefaction and recrystallization (L&R) process on organic–inorganic hybrid perovskites has been demonstrated to be an effective way to improve the quality of the as-deposited MAPbI3 films and increase the feasibility of preparing large area perovskite solar cells (PSCs). Despite the effectiveness, the reaction mechanism of the L&R process is yet to be well understood. In this work, we investigate the fundamental influences of amines on the structural change of MAPbI3 perovskite by studying the reaction between ammonia and a bulk MAPbI3 crystal. By employing various techniques including in situ X-ray diffraction, Raman spectroscopy and Fourier transform infrared spectroscopy, we find that NH3 effectively substitutes iodine in the perovskite crystal lattice, transforming the 3-dimensional (3D) lattice into a MAPb(NH3)nI3 coordination complex-based system. The resulting coordination complex octahedral structures are only held together by weak forces of attraction, leading to the experimentally observed L&R process. First-principles calculations further confirm the feasibility of such L&R at room temperature. As a proof of concept, we demonstrated the use of liquefaction for substrate recycling of MAPbI3 based solar cells with ammonia. Our results here provide deep insights for understanding the interaction mechanism, which can surely provide important guidance on improving the quality of perovskite films and related devices, as well as the recycling of toxic lead for long-term sustainability.
研究领域:
材料科学
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物理化学
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产品关联
DOI
高影响因子
Journal of Physical Chemistry C
·
2022
·
IF 4.177
Run Xu,Ziye Hong,Xiang Tong,Wenzhen Wang,Hua Meng,Juan Qin,Xiang Wang,Xin Shu,Jiancong Cai,Zifa Zhang,Fei Xu,Haitao Xu,Feng Hong,Huanzhen Qi,Jianming Lai,Dongmei Li
The surface structure and chemistry of semiconductor single crystals are crucial to optoelectronic and nanoelectronic devices. Unfortunately, little is known about the native surfaces of perovskite single crystals grown by solution-based methods. Here, we found that a textured surface with characteristic striations and pyramidal pits is often present on the native surface of MAPbI3 single crystal (SC), both of which result from an unexpected etching process due to the unsaturated solution residing at the surface. The striations reflect the instantaneous fluctuations of the vicinal growth planes for a particular growth sector. The etch pits originate from the outcrops of the edge dislocations and are featured with a rectangle pyramidal shape at the (100), (010), and {112} faces as well as a square pyramidal shape at the (110) surface plane. Such two characteristic features, especially for the etch pits that could derive the dislocation density (around 104–105 cm–2 for MAPbI3 SC at the (100) surface), could be used as standard methods to evaluate the quality of organic–inorganic halide perovskite SCs. The native surface morphology with the presence of both striations and pits is strongly dependent on the details of the SC taken-out process from the growth solution and the quality of the as-grown SC, which could be the main reason for wide variations in different reported surface morphologies and hence electrical properties of SC devices.
研究领域:
材料科学
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半导体物理
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钙钛矿光电子学
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晶体生长
✓ 已验证
DOI
高影响因子
Journal of Energy Chemistry
·
2021
·
IF 9.676
Xiaoyu Deng,Zhiyuan Cao,Chengbo Li,Shurong Wang,Feng Hao
Suppressing the nonradiative recombination in the bulk and surface of perovskite film is highly desired to improve the power conversion efficiency (PCE) and stability of halide perovskite solar cells (PSCs). In this study, a benzotriazole derivative (6-chloro-1-hydroxybenzotriazole, Cl-HOBT) is applied to improve the crystallinity and reduce the trap density of methylammonium lead iodide (MAPbI 3 ) perovskite film. Meanwhile, incorporation of Cl-HOBT elongates the photoluminescence carrier lifetime and charge-recombination lifetime, implying the trap-assisted nonradiative recombination is greatly suppressed. Besides, the improved energy level alignment and enhanced built-in potential are conducive to the charge carrier separation and transfer process with Cl-HOBT. Consequently, a PCE of 20.27% and an open-circuit voltage ( V oc ) of 1.09 V are achieved for the inverted MAPbI 3 PSCs, along with an 85% maintaining of the initial PCE under stored at relative humidity of 20% for 500 h. Furthermore, the existence of Cl-HOBT could inhibit the formation of Pb 0 defect under prolonged UV illumination to retard the degradation of perovskite film. It is believed that this study paves a novel path for the realization of high-efficiency PSCs with UV-stability.
研究领域:
材料科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2018
·
IF 3.779
Hao Zhang,Yalan Wang,Hong Wang,Meiyang Ma,Shuai Dong,Qingyu Xu
Photoelectric conversion efficiency of organic-inorganic perovskite solar cells has been rapidly raised and attracted great attention in recent years. The quality of perovskite films is vital for the performance of devices. We used the anti-solvent method to prepare CH 3 NH 3 PbI 3 thin films by spin coating and dried them at various temperature to transform adduct MAI·PbI 2 ·DMSO into CH 3 NH 3 PbI 3 . We researched in detail on the relationship between surface morphology of MAPbI3 thin films fabricated by the anti-solvent method and various drying temperature. We found that surface roughness and grain size of CH 3 NH 3 PbI 3 films together increased with increasing drying temperature. The larger grain size could efficiently reduce crystal boundaries which is advantageous for the suppression of photo-induced charge carrier recombination resulting in increase of FF. However, increase of surface roughness resulted in larger contact area at interface which might produce more tarp states and poorer wettability of HTM solution leading in decrease of J sc . Surface morphology of MAPbI3 layer on the performance of solar cell devices is also an important research issue. By optimizing the drying temperature to 60 °C, the highest efficiency of 14.4% was achieved for the CH 3 NH 3 PbI 3 -based solar cell devices.
研究领域:
材料科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2020
·
IF 6.984
Jianxing Xia,Junsheng Luo,Hua Yang,Zhongquan Wan,Haseeb Ashraf Malik,Yu Shi,Xiaojun Yao,Chunyang Jia
The major obstacles delaying the commercialization of thin film solar cells based on hybrid organic halide perovskite are the expensive materials, instability of the devices and the complicated multi-step fabrication process. To solve these challenges, we present a simple and high material utilization strategy which employing the polyethyleneimine (PEI) interface abduction to in-situ fabricate perovskite layer and hole transporting layer (HTL) from MAPbI 3 and Spiro-OMeTAD (SPI) mixed precursors in single step. Analyzation find that the in-situ phase separation is induced by the PEI abduction. The existence of PEI blocks SPI form Ti–O bond with bottom TiO 2 surface and converting the interaction between SPI and bottom interface to Van der Waals interaction . Employing this fabrication technique for PSCs, remarkably improves materials utilization of perovskite and SPI, as well as exhibiting superior stability of about 95% initial efficiency even after 68 days of storage in ambient condition without encapsulation. We believe that our strategy will pave a new way for simple, economical and stable PSCs preparation, and provide an inspiration to simplify fabrication process for organic-inorganic electronic devices.
研究领域:
材料科学
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能源技术
·
光伏器件
✓ 已验证
产品关联
DOI
高影响因子
ORGANIC ELECTRONICS
·
2023
·
IF 3.2
Qinjun Sun,Xueting Fan,Shuai Han,Hongyan Lv,Jian Zhao,Liyan Gao,Yuying Hao
Perovskite solar cells are generally fabricated by one-step or two-step solution deposition in an inert atmosphere . It is obvious that large-scale perovskite film preparation process in the air is the future trend. However, perovskite materials are easily degraded by water, resulting in low nucleation density and incomplete coverage of perovskite film. Here, we choose the drip-pressing method to regulate the quantity of moisture, which can also balance the grains growth and solvent volatility. The perovskite films were characterized by X-ray diffraction (XRD), Scanning electron microscope (SEM), UV–visible absorption, steady-state photoluminescence (PL) and in situ PL measurement. The orientation and quality of perovskite crystal are improved significantly in drip pressing, compared with traditional spin-coating. In addition, it facilitates to adjust the crystallization kinetics of perovskite by altering the imposed pressure in drip pressing. The grain size increases first and then decreases as pressure increases, reaching a maximum at 10 kPa. Meanwhile, the films become more and more compact as pressure increases. Perovskite films show great photoelectric performance at 30 kPa. The photoelectric conversion efficiency of the device in air can be improved from 10.99% to 13.21%. The results indicate that the drip-pressing method is in favor of high-quality of perovskite crystal in air.
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
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