ACS Applied Materials & Interfaces
·
2022
·
IF 10.383
Yating Fang,Yue Jiang,Zhengchi Yang,Zhengjie Xu,Zhen Wang,Xubing Lu,Xingsen Gao,Guofu Zhou,Jun-Ming Liu,Jinwei Gao
With the steady industrialization process of the perovskite solar cells (PSCs), the toxicity of the used solvents has become a pivotal issue that needs to be addressed. Especially, the usage of N,N-dimethylformamide (DMF) solvent would pose serious environmental and health concerns. Herein, we have reported a nontoxic solvent N-formylmorpholine (NFM) to replace the toxic DMF and have achieved a higher PCE of 22.78% compared to 21.97% when DMF was adopted. Moreover, with NFM, a widened antisolvent processing window was observed, facilitating the fabrication of PSCs with high reproducibility. This solvent engineering strategy offers an important solution to prepare eco-friendly, efficient, and stable perovskite solar cells.
研究领域:
材料科学
·
可再生能源
·
太阳能电池技术
·
环境科学
✓ 已验证
DOI
高影响因子
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
MATERIALS SCIENCE IN SEMICONDUCTOR PROCESSING
·
2020
·
IF 3.085
Zhou Liu,Shuzhen Wu,Xiaojie Yang,Yijun Zhou,Jiaren Jin,Junmei Sun,Li Zhao,Shimin Wang
SnO 2 has attracted extensive attention in planar perovskite solar cells (PSCs) owing to its outstanding photoelectric properties and low temperature preparation. However, pinholes are easy to appear in the annealing process of SnO 2 films, which limits its application in planar PSCs. Here lists a simple and low-cost method: Urea-complexed tin oxide in deionized water can effectively control the concentration of SnO 2 . This process is conducive to forming a compact surface morphology . Meanwhile, the work explored the effect of the properties of PSCs with different thicknesses of SnO 2 layers. The system analysis showed that PSCs based on 60 nm SnO 2 layer and the methamphetamine lead iodide (MAPbI 3 ) light absorber yielded the highest power conversion efficiency (PCE) over 18%, a fill factor ( FF ) of 0.793, and good stability. Therefore, we believe our study provides an effective way for preparing electron transport layers.
研究领域:
材料科学
·
可再生能源
·
太阳能电池
·
光伏技术
✓ 已验证
DOI
高影响因子
Nano Energy
·
2023
·
IF 17.6
Jingbo Yuan,Xiya Yang,Duo Zheng,Jiangtao Guo,Weize Lin,Jiawei Liao,Yudi Wang,L. Vaillant-Roca,Jialong Duan,Qunwei Tang
Silicon (Si) solar cell efficiently convert solar energy into electricity under the sun illumination , but its inherent intermittent power generation due to diurnal and seasonal cycle has usually allowed for the requirement for alternative power sources. Owing to the abundance, diversity and availability, rain drop energy is one of the most promising green energy sources. Hence, hybrid energy harvesting could be a promising strategy of achieving preferential hybrid performances without sacrificing the advantages in individual devices. Herein, we proposed a hybrid solar and rain energy harvesting device featuring the integration of triboelectric nanogenerator (TENG) top-cell and a crystalline Si solar cell bottom-cell by laminating perovskite quantum dots-embedded polydimethylsiloxane composite film (PQDP) onto the Si solar cell, which endows enhanced electrical output performances under rainy days. To overcome the limitation of low external quantum efficiency (EQE) in the ultraviolet region of the Si solar cell, the PCE of the hybrid solar cell is significantly enhanced from 18.47% of bare Si solar cell to 20.16% owing to the anti-reflection effect of PQDP film and the down-conversion property of CsPbBr 3 QDs doped with Ce 3+ ions. Meanwhile, this hybrid solar cell presents excellent durability after continuous measurement over 7 days. This tandem hybrid solar cell provides a promising strategy to simultaneously scavenging the solar and rain energy and boosting the power conversion efficiency by introducing the perovskite QDs without affecting the efficiency of bare Si solar cell.
研究领域:
材料科学
·
能源工程
·
纳米技术
·
可再生能源
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF MATERIALS SCIENCE
·
2020
·Vol. 55
·期 11
·4701-4716
·
IF 3.553
Ma Jianfeng,Zhao Hongxia,Shang Yazhuo,Peng Changjun,Liu Honglai,Zheng Shuzhen,Wang Tao,Qi Shuai,Ran Qianping
Abstract The presence of a highly alkaline environment or large amounts of Ca 2+ in concrete exerts a great influence on the dispersion of graphene oxide (GO) particles. Therefore, the development of a highly efficient GO dispersant to adapt to complex concrete environments is important. In this work, novel phosphate-modified small molecular polydentate polymers were synthesized and used as efficient dispersants for cement and high-concentration GO solutions. The chemical structure of the polymers was confirmed by 1 H NMR and IR spectroscopy, and the effect of adsorption groups on the adsorption ability of polymers was studied by using adsorption experiments and theoretical calculations. Results showed that the dispersant inositol hexaphosphate–methoxy polyether (IHP-MP) features a high adsorption equilibrium constant and strong adsorption ability. IHP-MP exhibited not only good water-reducing and slump-retaining properties but also remarkable cement hydration-retarding effects due to its numerous phosphate groups. IHP-MP could be used as an auxiliary GO dispersant with the comb polymer PCE to effectively reduce the viscosity and improve the stability of GO solutions. SEM, TGA and IR characterization indicated that IHP-MP strongly interacts with the surface groups of GO particles. Graphic Abstract
研究领域:
材料科学
·
化学工程
·
聚合物化学
·
土木工程
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2022
·
IF 16.744
Xiu Yun Gu,Chao Yue Zhang,Jun Di Cheng,Shi Qiang Kang,Kun Wei,Geng Zhi Sun,Xiu Ping Gao,Xiao Jun Pan,Jin Yuan Zhou
To develop highly active catalysts as counter electrodes is another promising way for improving the photovoltaic conversion efficiency (PCE) of fibrous dye-sensitized solar cells (FDSSCs). Then considering their applications in wearable electronic system, the designed fibrous counter electrodes (FCEs) should possess a good mechanical flexibility except high catalysis performances. Here in this work, hexagonal nickel telluride (Ni 3 Te 2 ) microsheets with tunable diameters and thicknesses were in-situ prepared via an atmospheric pressure chemical vapor deposition method on nickel wires. Benefiting from their two-dimensional laminated structure and asymmetric crystalline structure, the Ni 3 Te 2 microsheets show a high catalytic activity for the reduction of I 3 - → I - during the photoelectrochemical processes in FDSSCs. And cell tests show that the maximum PCE of FDSSCs with Ni 3 Te 2 FCEs reaches 11.81% (with an average value of 10.47%), which is 2.10 times that of the ones with Pt FCEs (5.62%). Furthermore, series of optimization on the microscale morphologies of Ni 3 Te 2 microsheets indicates that the suitable diameter (30 ∼ 40 μm) and thickness (ca. 3.0 μm) are suitable for the diffusion and reduction of I 3 - ions. Besides, the FDDSCs with Ni 3 Te 2 PCEs show a high cycling stability and an excellent dynamic bending stability (attenuation rate of 0.12‰ per bending cycle). This research would provide some insights into the design of high-performance FCEs for FDSSCs towards wearable electronic devices.
研究领域:
材料科学
·
纳米技术
·
太阳能
·
电化学
·
可穿戴电子
✓ 已验证
产品关联
DOI
高影响因子
ChemNanoMat
·
2022
·Vol. 8
·期 12
·e202200390
·
IF 3.82
Xueni Shang,Boxue Zhang,Deyu Gao,Mengjia Li,Chenglin Wang,Fanbin Meng,Cong Chen
Graphical A new three-dimensional organic spacer cation, 1,4-diazabicyclo [2,2,2] octane-1,4-diium (DABCO 2+ ) was developed to passivate defects and enhance the device stability. Low-dimensional additive engineering could effectively reduce the high-density trap defect density and improve the stability of perovskite solar cells (PSCs). To avoid the limiting effect of charge carrier transfer by incorporating the large-size long alkyl chain organic cations, we developed a new three-dimensional organic spacer cation, 1,4-diazabicyclo [2,2,2] octane-1,4-diium (DABCO 2+ ), to passivate the defects and enhance the device stability. DABCO 2+ with fine crystal structure and thermal stability could result in substantially fewer structural defects, enhance carrier lifetime, and inhibit nonradiative recombination loss. Structural analysis of CsFAPbI 3 perovskite doped with different concentrations of the three-dimensional organic spacer cations shows a clear correlation between the structure and the resultant perovskite films. Consequently, DABCO 2+ modified CsFAPbI 3 -based PSCs could achieve an optimized PCE of 23.02% with high stability exceeding 1500 h. This work opens a new approach to fabricating PSCs with enhanced stability for future commercial applications.
研究领域:
材料科学
·
太阳能
·
光伏技术
·
有机化学
✓ 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）