Energy & Environmental Materials
·
2022
·Vol. 6
·期 5
·e12426
·
IF 13.443
Xuefeng Zhu,Rui Lin,Hao Gu,Huichao Hu,Zheng Liu,Guichuan Xing,Yibing Wu,Xinhua Ouyang
Perovskite solar cells (PSCs) have been demonstrated to be one of the most promising technologies in the field of renewable energy. However, the presence of the defects in the perovskite films greatly limits the efficiency and the stability of the PSCs. The additive engineering is one of the most effective approaches to overcome this problem. Most of the successful additives are extracted from the petroleum-based materials, while the research on the biomass-based additives is still lagging behind. In this paper, two ecofriendly hydroxyalkyl cellulose additives, i.e., hydroxyethyl cellulose (HEC) and hydroxylpropyl cellulose (HPC), are investigated on the performance of the MAPbI 3 -based inverted PSCs. Due to the strong interaction between the hydroxyl groups of the cellulose and the divalent cations of the perovskite, these additives enhance the crystal grain orientation and significantly repair the defects of the perovskite films. Working as the additives, these two cellulose derivatives show a strong passivation ability, which significantly reduces the trap density and improves the optoelectronic feature of the PSCs. Compared with the average power conversion efficiency (PCE) of the control device (19.19%), an enhancement of ~10% is achieved after the addition of HEC. The optimized device (PCE = 21.25%) with a long-term stability (10:80 h, PCE = 20.93%) is achieved by the incorporation of the HEC additives into the precursor solution. It is the best performance among the PSCs with the cellulose additives up to now. This research provides a novel choice to develop a cost-effective and renewable additive for the PSCs with high efficiency and excellent long-term stability.
研究领域:
可再生能源
·
材料科学
·
太阳能电池技术
·
添加剂工程
✓ 已验证
产品关联
DOI
高影响因子
SOLAR ENERGY
·
2020
·
IF 4.608
Jian Liu,Dongjie Wang,Kun Chen,Jingrong Kang,Junliang Yang,Jian Zhang,Hailiang Zhang
The fabrication of high-performance, hole-conductor-free, printable mesoscopic perovskite solar cells (PMPSCs) is still a major challenge because it is difficult to realize the free diffusion of precursors throughout the micrometer-scale porous structure. Here, a facile and efficient additive manufacturing technique is proposed with melamine hydroiodide (MLAI) as an additional material. We systematically investigated the impact of MLAI on the crystallization, morphology, and defects of the perovskite film and the performance of the PMPSCs. The results revealed that the MLAI effectively optimized the morphology of perovskite and improved the pore-filling as well as passivated the defects of the perovskite film, thus hysteresis was reduced and the performance of the devices was enhanced. Based on the addition of MLAI, the power conversion efficiency (PCE) was obtained as 13.86%, which was 18.5% higher than that of the additive-free device. The additive engineering technique exhibits immense potential for large-scale production and application of PMPSCs.
研究领域:
材料科学
·
可再生能源
·
光伏技术
✓ 已验证
DOI
高影响因子
Nanoscale
·
2022
·Vol. 14
·期 16
·6109-6117
·
IF 8.307
Junyu Li,Yousheng Zou,Dawei Hu,Yu Gu,Zeyao Han,Jiaxin Liu,Xiaobao Xu
Terahertz (THz) detection technology is getting increasing attention from scientists and industries alike due to its superiority in imaging, communication, and defense. Unfortunately, the detection of THz electromagnetic waves under room temperature requires a complicated device architecture design or additional cryogenic cooling units, which increase the cost and complexity of devices, subsequently imposing an impediment in its universal application. In this work, THz detectors operated under room temperature are designed based on the thermoelectric effect with MAPbI3 single crystals (SCs) as active layers. With solution-processed molecular growth engineering, the anti-reflection 2D perovskite layers were constructed on SCs’ surfaces to suppress THz reflection loss. Simultaneously, by finely regulating the main carrier types and the direction of the applied bias across the inclined energy level, the thermoelectric effect is further promoted. As a result, THz-induced ΔT in MAPbI3 SCs reaches 4.6 °C, while the enhancement in the bolometric and photothermoelectric effects reach ∼4.8 times and ∼16.9 times, respectively. Finally, the devices achieve responsivity of 88.8 μA W−1 at 0.1 THz under 60 V cm−1, noise equivalent power (NEP) less than 2.16 × 10−9 W Hz−1/2, and specific detectivity (D*) of 1.5 × 108 Jones, which even surpasses the performance of state-of-the-art graphene-based room-temperature THz thermoelectric devices. More importantly, proof-of-concept imaging gives direct evidence of perovskite-based THz sensing in practical applications.
研究领域:
材料科学
·
电磁波检测
·
纳米技术
·
半导体物理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Journal of Materials Chemistry C
·
2023
·Vol. 11
·期 17
·5806-5814
·
IF 6.4
Liufang Chen,Zhihang Zhang,Wenjing Zhai,Guangyuan Li,Lin Huang,Xinyu Li,Wenhao Zheng,Lin. Lin,Xiaohui Zhou,Zhibo Yan,Jun-Ming Liu
Hybrid organic–inorganic perovskites have attracted wide attention due to their excellent photoelectric properties, but their stability is still one of the main obstacles to large-scale applications. Recently, the introduction of electric dipoles has become a new strategy for improving the stability and performance of perovskites. Herein, we study the stability and the photoelectric properties of CH3NH3PbI3 (MAPbI3) films fabricated with the addition of different amounts of ferroelectric poly(vinylidene fluoride–trifluoroethylene) (P(VDF–TrFE)). It is demonstrated that a suitable addition of P(VDF–TrFE) not only enhances the crystalline stability but also improves the light absorption, photoluminescence, and photocurrent responses of MAPbI3. A series of measurements were carried out to reveal that the permanent electric dipole from P(VDF–TrFE) suppresses ion migration due to the electrostatic interaction with the defects and improves the photocarrier transport because of the enhanced electrostatic screening effect, which well explains the improvement of stability and performance of MAPbI3 films.
研究领域:
材料科学
·
光伏技术
·
半导体物理
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2017
·Vol. 5
·期 16
·7423-7432
·
IF 8.867
Lin Fan,Yi Ding,Jingshan Luo,Biao Shi,Xin Yao,Changchun Wei,Dekun Zhang,Guangcai Wang,Yun Sheng,Yifeng Chen,Anders Hagfeldt,Ying Zhao,Xiaodan Zhang
It has been proposed that introducing the chlorine anion into a CH3NH3PbI3 perovskite material can substantially improve the materials properties as well as the solar cell performance. To elucidate the role of chlorine in perovskite solar cells (PSCs), here we introduced PbCl2 into the precursor, and studied the chlorine configuration evolution during perovskite film formation and the associated influence on PSC performance in detail. We found that chlorine could be successfully incorporated into the precursor film in the form of PbICl or PbCl2 through a properly designed preparation, and it was conserved in the final perovskite film with a configuration of MAPbCl3, PbICl or PbCl2 depending on the fabrication process. However, no evidence of a MAPbI3−xClx phase was observed, and it is considered that MAPbI3−xClx might be metastable or possesses a higher formation energy. In addition, we demonstrate that the formation of a porous PbICl scaffold in the precursor film plays a key role in high quality perovskite film realization, benefiting from an effective stress release during structure expansion after methylammonium iodide dripping. Moreover, we propose that residual amorphous PbCl2 can effectively passivate defects in perovskite film, and dramatically improve the film’s electrical properties. Finally, n–i–p type planar PSCs with efficiencies up to 19.45% were achieved. It should be mentioned that the whole process for the formation of the PSCs is performed at less than 100 °C, which is beneficial for a wide range of applications, such as flexible and tandem solar cells.
研究领域:
材料科学
·
能源科学
·
光伏技术
✓ 已验证
产品关联
DOI
高影响因子
RSC Advances
·
2018
·Vol. 8
·期 1
·390-395
·
IF 2.936
Xianwei Fu,Shilong Jiao,Ning Dong,Gang Lian,Tianyu Zhao,Song Lv,Qilong Wang,Deliang Cui
A room-temperature NO2 gas sensor with excellent performances is fabricated using an MAPbI3 (MA = CH3NH3+) thin film. It presents a high response even under extremely low NO2 concentrations. Its average response and recovery times are only ∼5 s and ∼25 s at room temperature, respectively, exhibiting its quick-responsive character. In addition, the MAPbI3-based NO2 sensor exhibits good selectivity. Interestingly, the sensitivity of the MAPbI3-based NO2 sensor is strikingly improved under high-pressure gas conditions. This phenomenon can be used for the online monitoring of chemical reaction processes and in situ detection of trace-level gas impurities under high-pressure conditions. Furthermore, based on theoretical calculations, a simple model is proposed to illustrate the corresponding gas-sensing mechanism.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2021
·Vol. 9
·期 7
·4138-4149
·
IF 12.732
Jiankai Zhang,Huangzhong Yu
The excessive energy loss (Eloss) mainly resulting from the energetic offsets between different layers and defect state-induced charge trapping and recombination limits the further development of perovskite solar cells (PVSCs). In this work, three solution-processed thiophene-based interlayers were firstly introduced to reduce the Eloss in PVSCs by optimizing the surface electronic states of the SnO2 electron transport layer (ETL) and improving the MAPbI3 film quality. The thiophene-based interlayers improve the conductivity and reduce the work function of SnO2 ETLs, resulting in more efficient electron transportation. Downward band-bending occurs at the SnO2/MAPbI3 interface owing to the permanent dipole moment of these interlayers, which enables more efficient charge carrier extraction and lower Eloss for PVSCs. In addition, the sulfur atoms of the thiophene rings with a lone pair of electrons can bond with the under-coordinated Pb2+ of MAPbI3, thus passivating the ion defect states and reducing the defect state-induced charge carrier trapping and recombination at the SnO2/MAPbI3 interface. These interlayers change the hydrophilicity of the SnO2 surface and promote the formation of high quality MAPbI3 films with larger grain size and fewer grain boundaries, improving the stability of PVSCs. Combining these desirable advantages, the optimized MAPbI3-based PVSCs achieve a highest power conversion efficiency (PCE) of 20.61% with a high open-circuit voltage (VOC) of 1.117 V and fill factor (FF) over 80%, which is higher than that of the pristine PVSCs with a highest PCE of 17.54%. The optimized PVSCs without any encapsulation show higher thermal and humidity stability compared with the pristine PVSCs. Therefore, this work demonstrates an effective way to reduce Eloss, as well as improving both the performance and stability of PVSCs by utilizing thiophene-based interlayers to modify the interface of SnO2/MAPbI3.
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
FERROELECTRICS
·
2019
·
IF 0.697
Weiwei Li,Jiangtao Zeng,Liaoying Zheng,Huarong Zeng,Chunbo Li,Abdelhadi Kassiba,Chulhong Park,Guorong Li
CH3NH3PbI3 (MAPbI3) has attracted great interest of researchers for its impressively high efficiency in solar cells. Researchers have debated whether or not MAPbI3 is ferroelectric for a long time. In this work, the ferroelectric hysteresis loops, dielectric properties, the real part of impedance and domain structure of the samples synthesized in ambient air (not in a glove box) are investigated. No domain switching current is found in the pellets and films at room temperature, but ferroelectric domains are observed in the films with in plane and out of plane conurations. The dielectric constant as a function of temperature shows that there is no ferroelectric to paraelectric phase transition. The complexity and uncertainty concerning the ferroelectricity of the samples synthesized in ambient air are the same as those synthesized in a glove box.
研究领域:
材料科学
·
物理学
✓ 已验证
产品关联
DOI
高影响因子
Nanomaterials
·
2019
·Vol. 9
·期 12
·1660
·
IF 4.034
Tao Wang,Huafang Zhang,Sumin Hou,Yan Zhang,Quanjun Li,Zhenlong Zhang,Huiping Gao,Yanli Mao
Organic–inorganic hybrid perovskites with well-defined morphology have attracted much attention due to their unique photophysical properties. However, controlling the morphology of nanocrystalline perovskite to improve its photoelectric application remains a challenge. In this article, using a modified solution deposition method, we successfully synthesized uniform methylammonium lead iodide (MAPbI3) nanoplates, nanocubes, and nanorods and investigated the effect of morphology on the photoelectric properties of these materials. We found that the morphology can be controlled by regulating the amounts of reactant methylammonium iodide (MAI) and the rate at which MAPbI3precursor is added into toluene solution, and that the corresponding size distributions can be optimized by tuning the final vacuum-drying temperature. The morphology has an obvious effect on the bandgap optimization and fluorescence enhancement of MAPbI3, and the nanoplates exhibit stronger photoluminescence intensity and have a longer carrier lifetime than nanocubes and nanorods. The results show that the morphologies of MAPbI3perovskite nanocrystals can be controlled by tuning the synthesizing conditions, and the MAPbI3perovskite nanocrystals with special morphology can be used in special nanosize optoelectronic devices.Keywords:organic–inorganic hybrid perovskites;synthesis;morphology control;MAPbI3;photoluminescence
研究领域:
材料科学
·
光电技术
✓ 已验证
DOI
PubMed
高影响因子
APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2023
·Vol. 129
·期 11
·1-7
·
IF 2.7
Yin Qianliu,Zhang Fanfan,Teng Yanlin,Peng Cong,Wang Chaonan,Jin Yonglong,Xu Meifeng,Xu Tian
Different concentrations of NH 4 Cl are introduced to MAPbI 3 precursor solution, planar MAPbI 3 perovskite films, and solar cells’ performance with or without NH 4 Cl have been studied. The NH 4 Cl/MAPbI 3 films exhibit increased grain size and narrowed grain boundaries. The light absorption of perovskite films with different concentrations of NH 4 Cl was also evaluated. To understand the growth of perovskite films with NH 4 Cl added to perovskite precursor solutions, XRD and XPS spectroscopy were conducted on different perovskite film samples. By adding NH 4 Cl, the MAPbI 3 film shows good crystal quality and the shift of Pb peaks indicates that NH 4 Cl is not physically mixed but chemically incorporated into MAPbI 3 films. We attribute the effect to Cl ions of NH 4 Cl combining with free lead ions of MAPbI 3 so as to fill the vacancy of volatile I ions in the NH 4 Cl–MAPbI 3 films. The 20 mg NH 4 Cl-based device showed an enhanced performance of a PCE of 13.67% compared to the device without adding NH 4 Cl with a PCE of 10.24%. The introduction of 20 mg NH 4 Cl achieved the best passivation effect. Using a 20 mg NH 4 Cl device, the trap density can be reduced to 0.84 × 10 16 cm −3 , resulting in more efficient charge removal from the surface and improved performance.
研究领域:
材料科学
·
太阳能
·
化学
✓ 已验证
DOI
高影响因子
ACS Sustainable Chemistry & Engineering
·
2025
·
IF 7.3
Xiangxin Meng,Die Hu,Qing Sun,Bo Shen,Shaocong Duan,Gang Liu,Bonan Kang,S. Ravi P. Silva
The presence of inherent imperfections at the perovskite-electron-transport layer (ETL) interface adversely affects the efficiency and stability of perovskite solar cells (PSCs). Here, 2-amino-1,3-propanediol (APDO) is preburied to stabilize the bottom side of the SnO2 ETL, eliminating inherent defects and passivating interface recombination. Meanwhile, the “anchoring effect” triggered by APDO at the grain growth interface can regulate the crystallization of perovskite crystals, which leads to perovskite films with homogeneous and fewer defects. Two methods are used to prebury the SnO2 ETL, which are marked as SnO2-APDO (doped) and SnO2/APDO (modified). Finally, the control device with MAPbI3 achieved a champion power conversion efficiency (PCE) of 20.17%, while with SnO2/APDO and SnO2-APDO ETL the values are 21.08% and 21.93%. Under a relative humidity (RH) of 30–40%, after 500 h of aging, unpackaged PSCs with SnO2/APDO and SnO2-APDO ETL maintain the original PCE of 89% and 93%, which with SnO2 ETL only maintain a PCE of 79%. The PCE of flexible PSCs with SnO2-APDO ETL increased from 18.87% to 20.64%, and the optimized device still maintains 89% of initial PCE after 5000 bending cycles with a bend radius of 5 mm, indicating that the introduction of APDO is an effective strategy to achieve high photovoltaic performance.
研究领域:
材料科学
·
光伏技术
·
纳米技术
·
能源工程
✓ 已验证
产品关联
DOI
高影响因子
Advanced Materials Interfaces
·
2022
·Vol. 10
·期 2
·2201513
·
IF 6.389
Zehen Liu,Pengpeng Cheng,Ruyan Kang,Jian Zhou,Xian Zhao,Jia Zhao,Zhiyuan Zuo
The rapid development of artificial intelligence (AI) requires processing vast amounts of complex information, which has accelerated the exploration of neuromorphic computing systems. Artificial neuromorphic synapses based on memristors of organic–inorganic halide perovskites (OHPs) potentially exploit a niche area for brain-inspired neuromorphic computing, which can be operated as biological synapses to realize signal processing. Here, MAPbI 3 -based memristors with reliable resistance states triggered by electric fields or photons are reported. A model for resistive switching (RS) originated from conductive filaments (CFs) based on intrinsic defect migrations is proposed. Importantly, the unique photoresponsive characteristic provides the opportunity to enhance the RS through multifunctional photo-coupling. Enhanced by monochromatic illumination, memristors exhibit RS with remarkable characteristics such as ultralow operating voltage, high ON/OFF ratio (4.3 × 10 3 ), small HRS/LRS variation coefficient (29.91%/13.82%), stable endurance (10 4 cycles), long retention time (10 5 s), and ultralow power consumption. Moreover, photons can modulate the nonvolatile devices to maintain a great ON/OFF ratio over 9 days under ambient conditions without any encapsulation. The research presents plausible applications of memristors in coupling ions, electrons, and photons, thus contributing to applicability for multifunctional optoelectronics and optogenetics tunable neuromorphic systems.
研究领域:
材料科学
·
电子工程
·
神经科学
✓ 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）