RSC Advances
·
2021
·Vol. 11
·期 6
·3380-3389
·
IF 3.361
Mukerem Helil Abib,Junchun Li,Heming Yang,Man Wang,Taotao Chen,EnzeXu,Yang Jiang
All inorganic carbon-based planar perovskites, particularly CsPbBr3, have attracted considerable attention due to their excellent stability against oxygen, moisture, and heat for photovoltaic utilization. However, the power conversion efficiency of carbon-based planar CsPbBr3 perovskite solar cells is mostly low, primarily because of the inferior film quality with undesirable crystallization and narrow light absorbance ranges. Herein, we develop a novel direct deposition approach combined with Sn doping to achieve highly efficient and stable carbon-based Sn-doped CsPbBr3 perovskite solar cells. Mass-scale Sn ion-doped CsPbBr3 perovskite powder was effectively synthesized and characterized via a facile strategy by adding hydrohalic acid in the CsBr, PbBr2 and SnBr2 precursor in a dimethyl sulfoxide solution. Moreover, using the as-synthesized CsPbBr3 and Sn-doped CsPbBr3 perovskite powder, PSCs were obtained via effective direct thermal evaporation. A smooth, constant and pinhole-free perovskite film was achieved with a configuration of FTO/TiO2/Sn:CsPbBr3/carbon. PSCs based on Sn:CsPbBr3 as an absorber and carbon as the HTM achieved an impressive power conversion efficiency of 8.95% compared to 6.87% for undoped CsPbBr3; moreover, it displayed admirable stability in an open-air atmosphere for an operational period of about 720 h without a noticeable negative result. The introduction of the Sn ion may advance the interface extraction of charge between the electric transport layer to the absorber layer and absorber to the carbon electrode. Accordingly, the Sn ion doping on CsPbBr3 during the synthesis phase and the direct evaporation paves a novel approach for intended photovoltaic applications.
研究领域:
材料科学
·
光伏技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Advanced Materials Technologies
·
2022
·Vol. 7
·期 9
·2200131
·
IF 8.856
Jinfeng Xie,Linzhong Wu,Muhan Cao,Qixuan Zhong,Ying Zeng,Chuanxin Ni,Qingyi Qian,Xiaohong Zhang,He Huang
1D APbX 3 (A = Cs, MA, FA, X = Cl, Br, I) nanorods (NRs) show potential for the future integrated optoelectronic devices as the ideal building blocks due to their outstanding optoelectronic performances. However, there is still a lack of high-efficiency controllable strategies to synthesize CsPbX 3 NRs. An interfacial synthesis strategy is shown here to fabricate CsPbBr 3 NRs by inserting Pb 2+ into postsynthetic CsBr nanocrystals in vortex method at the water-hexane interface. The water phase can intrinsically separate from the hexane phase in such a system and take away excess Pb 2+ and other side reaction salts. Additionally, without additional ligand assisted growth, the whole reaction system could result in a very clean surface of CsPbBr 3 NRs, eliminating the further purification process. The new approach for interfacial synthesis paves the way for efficient synthesis of CsPbBr 3 nanorods.
研究领域:
材料科学
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
Solar RRL
·
2020
·Vol. 4
·期 11
·2000390
·
IF 7.527
Santhosh Kumar Karunakaran,Gowri Manohari Arumugam,Wentao Yang,Sijie Ge,Saqib Nawaz Khan,Yaohua Mai,Xianzhong Lin,Guowei Yang
All-inorganic perovskite of CsPbBr 3 thin-films solar cells has attracted increasing interest in recent years due to its potential long-term stability over the generally used hybrid perovskites. Herein, all-inorganic CsPbBr 3 perovskites are doped with Eu 2+ to enhance the efficiency of perovskite solar cells (PVSCs). The perovskite films exhibit a better crystallinity with smooth morphology after the introduction of rare-earth elements. Hence, the hole-transport layer-free device with presence of Eu 2+ and low-cost carbon electrode achieves both enhanced efficiency and stability. In particular, the power conversion efficiency (PCE) enhances from 5.66% to 7.28% with high V OC of 1.45 V by optimizing the doping concentration of Eu 2+ . In addition, the storage stability measurements reveal excellent performances of PCE without encapsulation in air with relative humidity of 70–80%. These results can pave changes in future inorganic PVSCs.
研究领域:
材料科学
·
可再生能源
·
太阳能电池技术
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2025
·Vol. 15
·期 14
·1065
·
IF 4.3
Ying Lv,Menghan Duan,Jie An,Yunpeng Wang,Luchao Du
Lead halide perovskite quantum dots, also known as perovskite nanocrystals, are considered one of the most promising photovoltaic materials for solar cells due to their outstanding optoelectronic properties and simple preparation techniques. The key factors restricting the photoelectric conversion efficiency of solar cell systems are the separation and transmission performances of charge carriers. Here, femtosecond time-resolved ultrafast spectroscopy was used to measure the interfacial charge transfer dynamics of different sizes of CsPbBr 3 assembled with TiO 2 . The effect of perovskite size on the charge transfer is discussed. According to our experimental data analysis, the time constants of the interfacial electron transfer and charge recombination of the assembled systems of CsPbBr 3 and titanium dioxide become larger when the size of the CsPbBr 3 nanocrystals increases. We discuss the physical mechanism by which the size of perovskites affects the rate of charge transfer in detail. We expect that our experimental results provide experimental support for the application of novel quantum dots for solar cell materials.
研究领域:
光伏
·
纳米技术
·
材料科学
·
超快光谱学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Frontiers in Materials
·
2019
·
IF 2.689
Liu Min,Li Zhichun,Zheng Weilin,Kong Long,Li Liang
Metal oxides exhibit excellent barrier properties against moisture and oxygen, which are regarded as the powerful candidate for boosting the stability of perovskite nanocrystals (NCs). Here, we develop a simple method to coat perovskite NCs with PbO by peroxides post-treatment. Firstly, the didodecyl dimethyl ammonium sulfide (DDAS) was used to modify the CsPbBr3 NCs (DDAS-CsPbBr3), and then sequentially treated with benzoyl peroxide (BPO). By this way, the self-metal source (lead) can be easily oxidized, leading to the quick growth of lead oxide (PbO) on the surface of individual CsPbBr3 NCs. Under illumination with a 450 nm LED light (175 mW/cm2), the PbO coated CsPbBr3 NCs maintained at ~90% of the initial intensity for 20 h of operations; in contrast, the emission from the CsPbBr3 NCs completely quenched.
研究领域:
材料科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
CRYSTAL GROWTH & DESIGN
·
2020
·
IF 4.089
Fangbao Wang,Hongjian Zhang,Qihao Sun,Ahmed Ben Hafsia,Zhangxuan Chen,Binbin Zhang,Yadong Xu,Wanqi Jie
The all-inorganic halide perovskite CsPbBr3 exhibited extraordinary photoelectric properties as well as great potential for various optic-electronic devices. The introduction of a Cl/I dopant is an effective method to optimize their properties. However, it is still a challenge to grow doped CsPbBr3 single crystals from solution. In this work, we report on the crystal growth of Cl/I-doped CsPbBr3 crystals using the modified inverse temperature crystallization (ITC) method. The components of raw materials and solvent in precursors were precisely tailored. The resulting doping ratio between the actual content and the nominal content are 0.99 and 0.046 for Cl and I, respectively. It indicates that I ion doped crystals exhibit more severe stoichiometric deviation due to the lower decomposition energy. The crystal structure, morphology, and optical properties of doped crystals were also investigated systematically. The {101} and {010} facets of as-grown crystals were influenced by the doping process. PL and UV transmittance spectra exhibited changes in the band gap in Cl/I-doped crystals. Finally, the phase diagram of basic photoelectric properties was determined for CsPb(Br1–nCln)3 crystals and it reveals conductive type changes from the P type to N type with an increase in the doping content of the Cl element. The optimum component of CsPb(Br0.93Cl0.07)3 demonstrates the highest resistivity of 4.3 × 109 Ω cm, an on/off ratio of ∼40, and a mobility of 414 cm2 V–1 s–1 as well as the lowest carrier concentration of 3.57 × 107 cm–3. Our work provides a strategy to grow doped halide perovskite crystals and tailor their optical and electrical properties.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Nina Ma,Shuyi Ma,Gege Fan,Ping Ni,Jiayun Guo,Wei Ma
The accurate detection of hazardous gases and monitoring of ambient temperature are crucial for preserving the ecological environment, safeguarding human health, and fostering industrial advancement. In this research, a straightforward hydrothermal technique was employed to synthesize the heterogeneous nanocomposite structure of CsPbBr 3 /SnWO 4 , which facilitates the detection of ethanolamine gas at room temperature. The synthesized CsPbBr 3 /SnWO 4 heterostructures underwent further analysis using XRD , SEM , HRTEM , XPS , BET and Mott-Schottky techniques. The findings revealed that the CsPbBr 3 /SnWO 4 heterostructure exhibits a coarse cubic morphology, consisting of nano-cubic CsPbBr 3 and nano-sheet SnWO 4 . Additionally, the integration of CsPbBr 3 markedly enhances the specific surface area of the pristine SnWO 4 nanosheets. Due to its coarse surface, expansive contact area, and n-n heterojunction, CsPbBr 3 –SnWO 4 demonstrates remarkable selectivity, superior long-term stability, and a sensitivity of 45.6 to ethanolamine at ambient temperature. In conclusion, the CsPbBr 3 /SnWO 4 heterostructure, constructed from a cube with a rough surface, is anticipated to serve as an effective room temperature sensor with heightened selectivity for ethanolamine.
研究领域:
材料科学
·
环境科学
✓ 已验证
DOI
高影响因子
Advanced Materials Interfaces
·
2018
·Vol. 5
·期 22
·1801015
·
IF 4.834
Yang-Fan Xu,Xu-Dong Wang,Jin-Feng Liao,Bai-Xue Chen,Hong-Yan Chen,Dai-Bin Kuang
Artificially photocatalytic reduction of CO 2 into valuable chemicals, responding to the call of carbon neutral economy, has aroused considerable interests so far. Among those photocatalysts screened, an emerging and promising alternative of inorganic CsPbBr 3 perovskite has recently been reported. Here, to attain preferable photocatalytic performance, an amorphous-TiO 2 -encapsulated CsPbBr 3 nanocrystal (CsPbBr 3 NC/a-TiO 2 ) hybrid is demonstrated through a solution processing strategy. After optimizing the a-TiO 2 matrix amount by tuning the tetrabutyl titanate precursor volume, the CsPbBr 3 NC/a-TiO 2 composite exhibits a marvelous 6.5-fold improvement on the consumption of photoelectrons in photocatalytic CO 2 reduction reaction when compared with the individual CsPbBr 3 NC. Such significant enhancement is ascribed to the accelerated electron–hole separation and the multiplied CO 2 adsorption. Thus, as an available prototype, this work offers a rational encapsulation design for efficient halide perovskite photocatalyst.
研究领域:
材料科学
·
环境科学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Optical Materials
·
2025
·
IF 7.2
Ou Xu,Xiaoyan Lu,Xiaodong Shen,Tongzhou Li,Bao Ke,Jialong Zhao,Bingsuo Zou
CsPbBr 3 nanocrystals (NCs) have attracted extensive attention due to their high color purity and good thermal stability. However, due to the quenching of surface defects, the photoluminescence quantum yields (PLQY) are low, and there are few previous comparative studies on the magnetic ion doping of powders and nanocrystals in this system. In this article, the effect of Cr 3+ doping CsPbBr 3 NCs and CsPbBr 3 powders and their PL properties is investigated. The successful doping of Cr 3+ is verified by TEM, SEM, and EDS characterization. At the appropriate amount of Cr 3+ , the PLQY of Cr 3+ doped CsPbBr 3 NCs achieves 96%, twice that of undoped CsPbBr 3 NCs. However, the PLQY of the CsPbBr 3 powder does not change much after Cr 3+ doping at its close emission wavelength. The electron paramagnetic resonance (EPR), temperature dependent PL and density functional theory (DFT) calculation show that the enhanced PL of doped CsPbBr 3 NCs is due to the formation of exciton magnetic polaron (EMPs), while the confined excitons in undoped NCs are multiple due to spin-orbit interaction. In CsPbBr 3 powders, both EMPs and antiferromagnetic excitons (AMPs) coexist and compete, verified by the PL decay curve, temperature variation spectra, and low temperature PL spectra in strong magnetic field.
研究领域:
材料科学
·
光学
✓ 已验证
产品关联
DOI
高影响因子
CRYSTENGCOMM
·
2021
·Vol. 23
·期 16
·2938-2944
·
IF 3.545
Lijia Guo,Manying Liu,Yan Lei,Liwei Mi,Zhi Zheng
Inorganic perovskite CsPbBr3 is a suitable candidate owing to its excellent stability and outstanding visible light absorption. However, it is a huge challenge to fabricate single phase CsPbBr3 films. Herein, we developed an in situ metal reaction strategy to fabricate single phase CsPbBr3 films by reacting Pb precursors with CsBr/HBr in methanol solution. The thickness of the sputtered Pb film plays a key role in inhibiting the formation of a secondary CsPb2Br5 phase. The results indicate that the single phase CsPbBr3 films can be obtained by using below 40 nm of the sputtered Pb films, and the single phase CsPbBr3 device architecture exhibits 4.08% power conversion efficiency. This device can retain over 95% of the initial efficiency after 30 days of storage without packaging in an ambient environment.
研究领域:
材料科学
·
光伏技术
·
化学工程
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF LUMINESCENCE
·
2020
·
IF 3.28
Chao Zhang,Tingting Li,Weijia Wen,Xiangdong Luo,Lijuan Zhao
Perovskite-semiconductor composites formed by high quality CsPbBr 3 nanocrystals embedded in ZnSe microsphere were prepared. The optical properties of pure CsPbBr 3 and composites were studied in detailed. Highly enhanced luminescence from CsPbBr 3 -ZnSe composites was observed and the excitation power-dependent photoluminescence of samples showed that the recombination in all samples involves excitons . The recombination lifetimes of composites for both fast and slow decays increased compared with pure perovskite, indicating that the nonradiative combination was suppressed which may be possibly due to the decrease of both bulk and surface defects , owing to the passivation of ZnSe. Besides, the visible light absorption range of composites was extended, which suggests increasing efficiency of photoelectric conversion and the utilization of sunlight.
研究领域:
材料科学
·
光学
✓ 已验证
DOI
高影响因子
Surfaces and Interfaces
·
2023
·
IF 6.2
Kaibo Liang,Yunjia Wu,Qingshui Zhen,Yu Zou,Xiuchun Zhang,Chenhao Wang,Puyao Shi,Yangyang Zhang,Weihai Sun,Yunlong Li,Jihuai Wu
In recent years, CsPbBr 3 perovskite solar cells (PSCs) have attracted the attention of a large number of researchers due to their excellent temperature and humidity stability. And in the current studies, due to the lack of suitable solvents to dissolve PbBr 2 and CsBr at the same time, most studies have used sequential solution-processing techniques (SSPTs) to prepare CsPbBr 3 films. However, in the process of the sequential deposition of PbBr 2 and CsBr, the uneven reaction could lead to the generation of impure phase (e.g. CsPb 2 Br 5 and Cs 4 PbBr 6 ), which would deteriorate the photoelectric performance of the device. Here, a solvent-vapor annealing (SA) method has been proposed for fabricating mesoporous PbBr 2 films by exposing the PbBr 2 films in N,N -Dimethylformamide (DMF) vapor environment. The porous PbBr 2 frameworks could facilitate the reaction with CsBr to fully convert into inorganic perovskite CsPbBr 3 . A series of characterization results show that a compact, uniform and high-quality CsPbBr 3 film with large grains was obtained, where the porosity of PbBr 2 scaffold could be tuned by the volume of DMF. Consequently, the devices based on optimized PbBr 2 films treated by SA method achieved a champion power convention efficiency (PCE) of 9.60%, an open-circuit voltage ( V OC ) of 1.54 V, a short-circuit current density ( J SC ) of 7.57 mA cm −2 and a fill factor (FF) of 82.37%, compared with the devices treated by conventional thermal annealing (TA) method achieved a PCE of 8.42%, a V OC of 1.49 V, J SC of 7.31 mA cm −2 and FF of 77.30%. Furthermore, the SA treated devices exhibit more durable stability than TA treated devices, and the SA treated devices still retain 94.28% of its original PCE without any encapsulation in the ambient atmosphere after 30 days.
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
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