ACS Applied Materials & Interfaces
·
2021
·
IF 9.229
Yuanyuan Zhao,Jingwei Zhu,Benlin He,Qunwei Tang
The all-inorganic cesium lead bromide (CsPbBr3) perovskite solar cells (PSCs) have attracted considerable interest because of their outstanding environmental stability and low manufacturing cost. However, the state-of-the-art mesoscopic titanium dioxide (TiO2) electron-transporting layers (ETLs) always present low electron mobility, are destructive to perovskites under ultraviolet light illumination, as well as possess high sintering temperature. Nanostructured tin dioxide (SnO2) is a promising electron-transporting material for high-efficiency PSCs due to matching energy-level alignment with the perovskite layer, improved optical transparency, high electron mobility, excellent photostability, and low-temperature processing. Furthermore, rapid but poorly controlled perovskite crystallization makes it difficult to scale up planar PSCs for industrial applications. To address this issue, we adopt a dimensional SnO2 ETL to change the surface wettability for uniform perovskite coverage over large areas and the growth of large-sized CsPbBr3 grains, resulting in a maximum grain size of 1.65 μm. Moreover, the dimensional SnO2 ETL could increase the interfacial contact area between the CsPbBr3 layer and the ETL and enhance the electronic contact for efficient electron extraction to suppress or to eliminate the notorious hysteresis behavior. As expected, a power conversion efficiency (PCE) of 9.51% with an almost hysteresis-free phenomenon is achieved through dimensionality control of SnO2 films attributed to the remarkably enhanced light harvesting, accelerated electron extraction, diminished defect density, and reduced charge recombination. Upon further interfacial modification with graphene quantum dots (GQDs), the PSC based on the two-dimensional SnO2 ETL achieves a champion PCE of 10.34% due to the improved energy-level alignment at the device interface. Moreover, the best all-inorganic CsPbBr3 PSC free of encapsulation retains 93% of initial efficiency over 10 days at 80% relative humidity. This work provides an effective dimensionality control strategy for optimized charge transportation and enlarged perovskite grain size to make stable and efficient all-inorganic CsPbBr3 PSCs.
✓ 已验证
DOI
高影响因子
SOLAR ENERGY
·
2019
·
IF 4.674
Fei Zhao,Yixin Guo,Xiang Wang,Jiahua Tao,Jinchun Jiang,Zhigao Hu,Junhao Chu
Inorganic CsPbBr 3 perovskite solar cell (PSC) has attracted much attention owing to its outstanding air and thermal stability and low cost manufacture process. Crystalline TiO 2 (c-TiO 2 ) has been widely used as electron-transporting layer (ETL) material for inorganic CsPbBr 3 PSC. However, c-TiO 2 requires high-temperature (>450 °C) fabrication process which impedes the application of flexible inorganic CsPbBr 3 PSC and its low electron mobility further limits the performance enhancement. Herein, we prepared novel amorphous Nb 2 O 5 (a-Nb 2 O 5 ) ETL through a facile room-temperature sputtering method for inorganic planar CsPbBr 3 PSC. The PSC with a-Nb 2 O 5 ETL has gained a champion efficiency of 5.74%, which is higher than that of the PSC (5.12% or 4.67%) based on crystalline Nb 2 O 5 (c-Nb 2 O 5 ) ETL or c-TiO 2 ETL by high-temperature (500 °C) annealing. The improved photovoltaic characteristic for CsPbBr 3 PSC with a-Nb 2 O 5 ETL may be ascribed to its suitable work function, high optical transmittance, low charge recombination at the a-Nb 2 O 5 /CsPbBr 3 interface and the superior crystallinity of CsPbBr 3 film deposited on a-Nb 2 O 5 ETL. Moreover, the a-Nb 2 O 5 -based CsPbBr 3 PSC without encapsulation exhibits a good long-term stability in ambient atmosphere. This work offers a new research direction for preparing high-performance inorganic PSC.
✓ 已验证
DOI
高影响因子
Advanced Science
·
2019
·Vol. 6
·期 11
·1802046
·
IF 15.804
Cong Chen,Yanjie Wu,Le Liu,Yanbo Gao,Xinfu Chen,Wenbo Bi,Xu Chen,Dali Liu,Qilin Dai,Hongwei Song
Photovoltaic devices employing lead halide perovskites as the photoactive layer have attracted enormous attention due to their commercialization potential. Yet, there exists challenges on the way to the practical use of perovskite solar cells (PSCs), such as light stability and current–voltage ( J – V ) hysteresis. Inorganic perovskite nanocrystals (IPNCs) are promising candidates for high-performance photovoltaic devices due to their simple synthesis methods, tunable bandgap, and efficient photon downshifting effect for ultraviolet (UV) light blocking and conversion. In this work, CsPbBr 3 IPNCs modification could give rise to the vapor phase and solution-processed PSCs with a power conversion efficiency (PCE) of 16.4% and 20.8%, respectively, increased by 11.6% and 5.6% compared to the control devices for more efficient UV utilization and carrier recombination suppression. As far as is known, 11.6% is the most effective enhanced factor for PSCs based on photon downshifting effect inside of devices. The CsPbBr 3 layer could also significantly retard light-induced degradation, leading to the lifetime over 100 h under UV illumination for PSCs. Additionally, the modified PSCs exhibit weak hysteresis and multiple colors of fluorescence. These results shed light on the future design of combining a photon downshifting layer and carrier interfacial modification layer in the applications of perovskite optoelectronic devices.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Physica Status Solidi-Rapid Research Letters
·
2025
·
IF 2
Yuyang Li,Hui Liu,Li Ding,Deren Yang,Yanjun Fang
Perovskite nanocrystals (PNCs) have emerged as promising candidates for X-ray detection due to their large X-ray stopping power and their presynthesized crystalline nature, which enables high-quality thick-film deposition via a scalable spray coating process. However, the inherent high defect density at the surface of PNCs significantly hampers the charge collection efficiency and overall stability of X-ray detectors. In this study, the Cs/Pb precursor ratio is identified as a critical factor in mitigating defect formation in CsPbBr 3 PNCs. By introducing a moderate Cs-deficient stoichiometry, both defect density and self-doping within the PNCs are effectively reduced. Additionally, PNCs are incorporated into organic bulk-heterojunctions to fabricate nanocomposite X-ray detectors, showing that this stoichiometry regulation not only enhances the detectors’ sensitivity but also decreases the dark current and significantly improves their environmental stability. These advancements hold substantial potential for high-performance flat-panel X-ray imaging applications in the future.
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2025
·
IF 8.2
Huiren Zheng,Jize Wang,Junye Pan,Chunyang Zheng,Yuxin Zhang,Ankang Shu,Bin Li,Shaowen Cao,Yong Peng
Underwater photovoltaics plays a pivotal role in photovoltaic applications. However, the underwater solar spectrum differs significantly from that in air, and as water depth increases, solar spectra across various wavebands exhibit distinct attenuation rates. Specifically, the attenuation rate of the red component of sunlight is considerably higher than that of green and blue light (400–600 nm). Thus, under these unique spectral conditions, there is an urgent need to develop stable devices that minimize power conversion efficiency (PCE) loss with increasing water depth. The 4-terminal (4T) structure tandem cell, designed with 2.35 eV CsPbBr3 and 1.63 eV Cs0.05(FA0.83MA0.17)0.95Pb(I0.83Br0.17)3, is prioritized due to its suitable optical response range and low PCE loss with increasing water depth. As CsPbBr3 utilized blue and green light in tandem, which has the highest light intensity underneath water, this study employed doping of SrBr2 into the CsPbBr3 film. This approach reduced the defect density of the film, enhanced carrier transport efficiency, and improved the photoelectric responsivity of the device in the 425–500 nm band. The CsPbBr3 perovskite solar cells that were fabricated demonstrated a high open-circuit voltage of 1.46 V and an exceptional PCE of 7.62%. Additionally, these devices exhibited excellent stability. Consequently, the 4T tandem device achieved PCEs of 15.28, 11.79, and 10.33% at 0, 0.5, and 0.7 m underwater depths respectively, with a variation rate of only 32%. Furthermore, the device demonstrated remarkable stability under working conditions, with an efficiency decay of less than 13% after continuous irradiation for 30 days. These findings suggest that the 4T tandem solar cell holds considerable potential for application in underwater photovoltaics.
✓ 已验证
产品关联
DOI
PubMed
高影响因子
MICROCHIMICA ACTA
·
2021
·Vol. 188
·期 1
·1-8
·
IF 5.833
Li Feiming,Feng Yufeng,Huang Yipeng,Yao Qiuhong,Huang Guihua,Zhu Yimeng,Chen Xi
Abstract Considering the high importance of the rapid detection of chloride ion (Cl − ) in sweat for the diagnosis of fibrotic cysts, we have investigated the heterogeneous halide exchange between CsPbBr 3 perovskite nanocrystals (PNCs) in n -hexane and Cl − in aqueous solution. The results show that CsPbBr 3 PNCs could achieve fast halide exchange with Cl − in the aqueous phase under magnetic stirring at pH = 1, accompanied by a significant wavelength blue shift and vivid fluorescence color changes from green to blue. Therefore, a fluorescence wavelength shift-based colorimetric sensing of Cl − based on the halide exchange of CsPbBr 3 PNCs has been developed to realize the rapid detection of Cl − in sweat. Compared with the conventional fluorescence intensity-based method, this method is of high convenience since the whole procedure could be achieved within 5 min without any sample pretreatment (even no dilution), demonstrating promising application prospects.
Fluorescence wavelength-shift based colorimetric sensing of chloride in sweat via halide exchange of CsPbBr 3 perovskite nanocrystals
✓ 已验证
DOI
PubMed
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Jingwei Zhu,Yu Liu,Benlin He,Wenyu Zhang,Lifang Cui,Sudong Wang,Haiyan Chen,Yanyan Duan,Qunwei Tang
The back interface issues including numerous defects and imperfect contact, mismatched energy level are regarded as the key detrimental factors causing serious charge recombination and energy loss ( E loss ) and inferior charge extraction to achieve high efficiency Hole transport materials-free (HTMs-free) carbon-based Perovskite solar cells (PSCs). To address this drawback, an effective interface engineering via depositing N, N'-Dicyclohexylcarbodiimide (DCC) at PVSK/Carbon back interface is creatively implemented to passivate CsPbBr 3 surface defects through forming interaction between N atoms with lone pair electrons and uncoordinated ions (eg Pb 2+ and Cs + ions) to suppress the defect states induced non-radiative recombination and E loss . Concurrently, the smoothness and valence band of PVSK film with DCC modification are increased to improve the contact and band alignment at back interface, respectively, remarkably accelerating hole extraction and transportation and also reducing E loss as well as charge recombination. As a result, the comprehensive performance of DCC interface modified HTMs-free carbon-based CsPbBr 3 PSCs is significantly enhanced, especially the champion efficiency boosts to 10.16% from 6.60% of the control PSC. Furthermore, owing to the enhanced hydrophobicity and decreased imperfections of PVSK film with DCC modification, the optimized device without any encapsulation displays an excellent long-term stability under 85% RH air condition at 85 °C over 1200 h.
✓ 已验证
DOI
高影响因子
Journal of Energy Chemistry
·
2019
·
IF 5.162
Xiaojing Wan,Ze Yu,Wenming Tian,Fuzhi Huang,Shengye Jin,Xichuan Yang,Yi-Bing Cheng,Anders Hagfeldt,Licheng Sun
All-inorganic cesium lead bromide (CsPbBr 3 ) perovskite is attracting growing interest as functional materials in photovoltaics and other optoelectronic devices due to its superb stability. However, the fabrication of high-quality CsPbBr 3 films still remains a big challenge by solution-process because of the low solubility of the cesium precursor in common solvents. Herein, we report a facile solution-processed approach to prepare high-quality CsPbBr 3 perovskite films via a two-step spin-coating method, in which the CsBr methanol/H 2 O mixed solvent solution is spin-coated onto the lead bromide films, followed by an isopropanol-assisted post-treatment to regulate the crystallization process and to control the film morphology. In this fashion, dense and uniform CsPbBr 3 films are obtained consisting of large crystalline domains with sizes up to microns and low defect density. The effectiveness of the resulting CsPbBr 3 films is further examined in perovskite solar cells (PSCs) with a simplified planar architecture of fluorine‒doped tin oxide/compact TiO 2 /CsPbBr 3 /carbon, which deliver a maximum power conversion efficiency of 8.11% together with excellent thermal and humidity stability. The present work offers a simple and effective strategy in fabrication of high-quality CsPbBr 3 films for efficient and stable PSCs as well as other optoelectronic devices.
✓ 已验证
DOI
高影响因子
Inorganic Chemistry Frontiers
·
2020
·Vol. 7
·期 10
·2060-2071
·
IF 5.958
Lei Qiu,Hang Yang,Zhigao Dai,Fengxu Sun,Jiarui Hao,Mengyu Guan,Peipei Dang,Chunjie Yan,Jun Lin,Guogang Li
Poor stability of CsPbX3 (X = Cl, Br or I) perovskite quantum dots (QDs) has greatly hindered their practical photoelectric applications, and how to improve it still remains a critical challenge. Herein, we encapsulated CsPbBr3 QDs into dual-shell hollow silica (SiO2) spheres via a simple successive ionic layer adsorption and reaction (SILAR) method. The hierarchical dual-shell structures permit CsPbBr3 QDs to be anchored on the interior of the SiO2 spheres while keeping the outside surface undisturbed, which can protect the CsPbBr3 QDs from direct exposure to the atmosphere. Due to the comprehensive protection of dual-shell hollow SiO2 spheres, the CsPbBr3/SiO2 nanospheres exhibit markedly enhanced stability against light and heat, with a residual PL intensity of 89% after continuous exposure for 72 h to UV light and 65% after 100 °C heat treatment, respectively. In addition, an optimal PLQY of 89% is obtained with suppressed nonradiative recombination. Finally, the fabricated white light-emitting diode (LED) device by employing CsPbBr3/SiO2 green phosphors could achieve a wide color gamut covering up to 136% of the NTSC standard. This work provides a novel SiO2-based encapsulation approach to solve the intrinsic instability issues of CsPbBr3 QDs, which has a profound impact on their practical applications.
✓ 已验证
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2025
·Vol. 60
·期 45
·22850-22864
·
IF 3.9
Wu Yang,Ding Tongshun,Liang Hongfei,Song Juan,Qu Suteng,Xu Yafei,Song Jian
Crystalline silicon solar cells (CSSCs) continue to dominate the photovoltaic market due to their decreasing costs and increasing efficiency. However, as CSSC efficiency approaches the Shockley–Queisser limit, conventional strategies for further performance improvement have become increasingly ineffective. The photon downconversion effect offers a promising solution. However, obtaining stable and efficient downconversion materials remains a significant challenge. This study proposes using trioctylphosphine (TOP) as a passivating ligand for CsPbBr 3 quantum dots, combined with a ZnO protective layer constructed using Zn(C 2 H 5 ) 2 , to enhance stability and performance. The use of 70 μL TOP and 30 μL Zn(C 2 H 5 ) 2 leads to the optimal downshifting film. The resulting CsPbBr 3 QD@TOP@ZnO/EVA composite film exhibits a significant 0.85% enhancement in CSSC efficiency. In addition, after an 18-day PCE stability test on the device, its PCE efficiency stability was comparable to that of EVA film, demonstrating its potential to enhance solar cell performance by downconverting.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2019
·Vol. 7
·期 12
·6877-6882
·
IF 10.733
Yuanyuan Zhao,Yudi Wang,Jialong Duan,Xiya Yang,Qunwei Tang
Substitution of Pb2+ sites with smaller isovalent ions has been regarded as an effective strategy to optimize the crystal lattice of organic–inorganic hybrid perovskites such as releasing lattice strain, increasing the formation energy of vacancies and tuning the bandgap energy distribution. We report here the compositional engineering of the inorganic CsPbBr3 perovskite by doping divalent hard Lewis acids (Mg2+, Ca2+, Sr2+ and Ba2+) and their application in all-inorganic perovskite solar cells free of hole transporting layers and precious metal electrodes. By optimizing the doping dosage, a maximal power conversion efficiency as high as 9.63% is achieved for a CsPb0.97Sr0.03Br3 based photovoltaic device, mainly attributed to the enlarged grain sizes and suppressed formation of point defect (vacancies) within perovskite films, therefore reducing the photocurrent loss within modules. Furthermore, the unencapsulated Sr-containing solar cell shows ultrastability comparable to that of state-of-the-art CsPbBr3 perovskite solar cells under persistent attack in 80% relative humidity over 800 h. The increased efficiency and improved stability demonstrate all-inorganic perovskite solar cells with divalent hard Lewis acid doped CsPbBr3 perovskites to be a new frontier for thin-film photovoltaics.
✓ 已验证
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2025
·
IF 3.6
Hongyu Liu,Yue Zhang,Shuo Song,Xinxin Guo,Liwei Wang,Qiang Fu,Wenzhi Wang
CsPbBr 3 perovskite quantum dots (PQDs) have been considered as potential luminescent materials for lighting and display applications. The oleylamine (OLA) is usually considered to be an indispensable surface ligand in the synthesis of PQDs. However, the long-chain amines can cause more surface defects, resulting in the poor stability and optical performance, which will greatly limit its practical application. Herein, the n-amylamine (ALA) with short carbon chain has been chosen to replace the OLA as surface ligand to synthesize the CsPbBr 3 PQDs. Under the synergic action of oleic acid (OA), ALA-CsPbBr 3 PQDs with enhanced air/thermal stability and optical properties can be obtained through a modified hot-injection method. The ALA-CsPbBr 3 PQDs possess highly monodisperse cubic morphologies (∼10 nm edge lengths), which are similar to the OLA-CsPbBr 3 PQDs. Meanwhile, ligand substitution does not alter the crystal structure, and maintain the cubic crystal structure of CsPbBr 3 . The synthesized ALA-CsPbBr 3 PQDs exhibits a PLQY of 91.3 %, significantly higher than that of OLA-CsPbBr 3 (70.42 %). Photo-stability test indicates that ALA-CsPbBr 3 PQDs are markedly more stable than OLA-CsPbBr 3 PQDs, owing to the passivation of the surface defects. Furthermore, the activation energy of ALA-CsPbBr 3 PQDs (570.8 meV) is higher than OLA-CsPbBr 3 PQDs (495.4 meV), indicating the ALA-CsPbBr 3 PQDs have the much higher thermal stability. In addition, the ALA-CsPbBr 3 PQDs can also be efficiently excited by X-rays, showing a linear response to X-ray radiation, and have good X-ray imaging capability. The CsPbBr 3 PQDs with enhanced stability and optical properties, which are modified by short carbon-chain surface ligands, can further strengthen the competitiveness of PQDs for optoelectronic device applications.
✓ 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）