ORGANIC ELECTRONICS
·
2019
·
IF 3.495
Xin Qi,Ganghong Liu,Duo Wang,Ning Zhu,Yuqing Zhang,Zehao Zhang,Cuncun Wu,Xiangdong Li,Wei Luo,Yingqiang Li,Haozhe Hu,Zhijian Chen,Lixin Xiao,Shufeng Wang,Bo Qu
Interfacial modification as a feasible strategy to improve the properties of perovskite solar cells (PSCs) has been widely studied in recent years. In this work, PbCl 2 modification at the interface of SnO 2 /CH 3 NH 3 PbI 3 was used for CH 3 NH 3 PbI 3 -based planar PSCs. The introduction of PbCl 2 between SnO 2 and CH 3 NH 3 PbI 3 layers boosted the crystallization of perovskite film, which promoted the photovoltaic properties of corresponding PSCs. The open circuit voltage ( V OC ) and fill factor (FF) of the PbCl 2 -modified devices (1 mg/mL) were 1.11 V and 0.79, respectively, which were both higher than those of the reference devices without PbCl 2 (1.04 V and 0.76). Moreover, a steady-state power output efficiency exceeding 19% was obtained for the PbCl 2 -modified devices (1 mg/mL), which implied that PbCl 2 modification was an effective and low cost strategy for efficient PSCs.
研究领域:
材料科学
·
光伏技术
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纳米科技
·
表面与界面工程
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能源材料
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半导体器件
·
功能材料
✓ 已验证
DOI
高影响因子
SOLAR ENERGY
·
2025
·
IF 6.6
Huizhen Ke,Qinyi Zhang,Jiawei Zhan,Ying Zhang,Shuyu Zhang,Minglin Zhang,Pengyun Zhang
Open-air-processed perovskite solar cells (PSCs) already garnered significant attention of the international scholars because the uncomplicated and economically viable production methods. Nevertheless, the ambient atmosphere frequently poses a multitude of detrimental factors. For example, suboptimal levels of humidity and the presence of oxygen can result in flawed perovskite crystal formation and numerous surface imperfections, significantly diminishing the power conversion efficiency (PCE) and adversely affecting the final PSCs’ overall stability. Therefore, we employ an optimal approach utilizing liquid-phase small molecules to systematically optimize the perovskite layer, specifically incorporating the additive Perfluoro(4-methylpent-2-ene) (C 6 F 12 ), into an environmentally benign anti-solvent for fabricating the MAPbI 3 layer. The C 6 F 12 molecules, are liquid at room temperature, consist of carbon–carbon single or double bonds and carbon–fluorine bonds. Through Lewis acid-base interactions, the fluorine atoms within C 6 F 12 can establish some covalent bonds with lead and methylamine, as well as form hydrogen bonds with methylamine. These bonding mechanisms proficiently address the vacancies created by iodine (V I ) within the perovskite framework. Meanwhile, the inherent hydrophobic properties of fluorine atoms provide improved moisture resistance to perovskite films produced in atmospheric conditions, thereby enhancing the resultant PSCs’ stabilization. Consequently, the upgrade perovskite layers demonstrate larger grain dimensions and diminished trap density. The optimal device, passivated with C 6 F 12 and processed in air, achieves a champion PCE of 21.25%, approaching the performance of samples fabricated in a glove-box. Furthermore, the non-encapsulated device modified with C 6 F 12 demonstrates exceptional stability across multiple variables. This straightforward and environmentally friendly approach is expected to broaden the applicability of PSCs.
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
ACS Applied Energy Materials
·
2023
·
IF 6.4
Wenjing Qi,Jiale Li,Peng Wang,Hao Ling,Xinpeng Zhang,Xiangyu Li,Lei Tao,Xue Fu,Khumal Sohail,Linchuan Ma,Jingshan Luo,Yuelong Li
The controlled crystallization process is of significance to the morphological quality of wide-band-gap perovskite absorbers, especially with excessive bromide ions. Moreover, the non-radiative recombination assisted by surface defects is one of the major unfavorable factors that confines the development of highly efficient wide-band-gap perovskite solar cells (PSCs). Here, 1.65 eV wide-band-gap PSCs are constructed by a sequential deposition method with tailored morphology of highly reproducible perovskite absorbers. The controlled crystallization with the help of NH4Cl enables the perovskite films with larger and more uniform grains, which result in less bulk defects. At the same time, (NH4)2SO4 as a passivation layer reduces the uncoordinated Pb2+ and Pb0 defects on the surface of the perovskite film and improves the hydrophobicity due to newly formed insoluble PbSO4. Eventually, the synergistic effect of ammonium salts results in a high VOC of 1.18 V and an optimal efficiency of 20.43%, which is one of the highest power conversion efficiencies for 1.65 eV wide-band-gap-based PSCs constructed by a two-step deposition process. This work confirms that the sequential deposition method and addition of proper ammonium salts are effective strategies toward highly efficient and stable wide-band-gap PSCs.
研究领域:
材料科学
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太阳能
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2023
·
IF 15.1
Jin Huang,Hao Wang,Chunyang Chen,Yizhe Tang,Husheng Yang,Shengzhong Liu,Dan Zhang
All-inorganic CsPbI 3 perovskite solar cells (PSCs) play a significant role in the new generation photovoltaic technology because of their unique optical band gap and excellent light absorption performance. However, the generation of defect states during the fabrication will cause serious non-radiative recombination and film degradation. Therefore, a new organic additive 4-Thioureidobenzoic acid (4-TBA) was introduced to decrease the defect density and optimize the device performance in this work. Thiourea group and carboxyl group in 4-TBA could not only be anchored on the film surface to passivate uncoordinated Pb 2+ defects as bilateral Lewis base, but also form the adjustable skeleton at the grain boundaries to fill Cs + vacancies, support perovskite framework, boost the charge transfer and enhance the film crystallinity. Owning to the hydrophobicity of benzene ring structure of 4-TBA, the hydrophobic protective layer could be formed on the film surface and grain boundary to isolate the damage of external moisture to the device. Furthermore, with the release of residual stress in the film, the stability of device is substantially improved. Eventually, the 0.02 mol% 4-TBA based device prepared by one-step spin-coating method possesses an ultra-high power conversion efficiency (PCE) of 20.26%, which is one of the greatest efficiencies of all-inorganic CsPbI 3 PSC at present. Surprisingly, after 1000 h of environmental stability test, the optimized device still maintains 95.6% of original efficiency without encapsulation, and the PCE attenuation is only 4.4%, showing excellent long-term stability.
研究领域:
材料科学
·
能源技术
·
光伏器件
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Fan Ye,Cangshuang He,Tong Wu,Shuo Chen,Zhenghua Su,Xianghua Zhang,Xingmin Cai,Guangxing Liang
Kesterite Cu 2 ZnSnS 4 (CZTS) solar cells with CdS buffer layers have the problem of toxicity and cliff-like energy band diagram disfavoring higher photoelectric conversion efficiency (PCE (%)). The preparation method for ZnSnO buffer layers which enable Cd-free CZTS solar cells to reach the certified PCE (%) of 11.4 is limited to atomic layer deposition and sputtering deposition severely reduces PCE (%). Here, it is showed that sputtering deposited ZnSnN 2 is an efficient buffer layer for Cd-free CZTS solar cell, and without antireflection coating or additional passivation layers its champion PCE (%) has reached 10.00 which is comparable to the certified value. No buried junction and current blocking behavior are observed in the CZTS\ZnSnN 2 junctions. Elemental inter-diffusion is observed at the interface between CZTS and ZnSnN 2 . Most importantly, the energy band of ZnSnN 2 is well-matched with that of CZTS. The former straddles the latter. The conduction band offset is spike-like with the conduction band of ZnSnN 2 higher than that of CZTS, which effectively suppresses interface recombination and results in PCE (%) comparable to the certified value.
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
Advanced Science
·
2023
·
IF 15.1
Quanzhen Sun,Chen Shi,Weihao Xie,Yifan Li,Caixia Zhang,Jionghua Wu,Qiao Zheng,Hui Deng,Shuying Cheng
Ion doping is an effective strategy for achieving high-performance flexible Cu 2 ZnSn(S,Se) 4 (CZTSSe) solar cells by defect regulations. Here, a Li&Na co-doped strategy is applied to synergistically regulate defects in CZTSSe bulks. The quality absorbers with the uniformly distributed Li and Na elements are obtained using the solution method, where the acetates (LiAc and NaAc) are as additives. The concentration of the harmful Cu Zn anti-site defects is decreased by 8.13% after Li incorporation, and that of the benign Na Zn defects is increased by 36.91% after Na incorporation. Synergistic Li&Na co-doping enhances the carrier concentration and reduces the interfacial defects concentration by one order of magnitude. As a result, the flexible CZTSSe solar cell achieves a power conversion efficiency ( PCE ) of 10.53% with certified 10.12%. Because of the high PCE and the homogeneous property, the Li&Na co-doped device is fabricated to a large area (2.38 cm 2 ) and obtains 9.41% PCE . The co-doping investigation to synergistically regulate defects provides a new perspective for efficient flexible CZTSSe solar cells.
研究领域:
材料科学
·
太阳能
·
半导体物理
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Biomass Conversion and Biorefinery
·
2022
·
IF 4.05
Liu Xin,Wang Qing,Song Xin,Li Kang,Ali Mukhtiar,Wei Changlong,Che Jilu,Guo Siwei,Dou Xuedan
In this study, a novel and environmental-friendly biochar prepared by alien species, Alternanthera philoxeroides ( AP ) under a temperature range of 300–700˚C (BC300-BC700), was applied to remove phenanthrene (PHE), perchloroethylene (PCE), and PHE/PCE bi-contaminant from aqueous solutions. Interestingly, the maximum adsorption capacity of AP biochar changed nonlinearly as the pyrolysis temperature increased, with BC400 and BC300 having the highest maximum adsorption capacities of 2.83 and 2.13 mg/g, respectively, followed by BC700, BC500, and BC600. The sorption kinetics of PHE and PCE on BC300 under single- and bi-contaminant conditions can be described by pseudo-second-order and pseudo-first-order kinetic models, respectively. In addition, it was observed that PHE and PCE could be removed simultaneously by BC300, and the presence of PHE inhibited the maximum sorption capacity of PCE onto AP biochar. Furthermore, this study revealed that the functional groups of C-O, C = O, and C = C played a key role in the removal of PHE/PCE from bi-contaminant solutions. These findings suggested that pyrolysis of invasive plants can be an option to control invasive plants and also contribute to the adsorption of organic contaminants for contaminant remediation. Graphical abstract
研究领域:
环境科学
·
污染修复
✓ 已验证
产品关联
DOI
高影响因子
SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2021
·
IF 7.267
Chao Peng,Hang Su,Jing Li,Qiuyue Duan,Qianhui Li,Junyan Xiao,Zhiliang Ku,Jie Zhong,Wei Li,Yong Peng,Fuzhi Huang,Yi-bing Cheng
Compared with traditional rigid perovskite solar cells fabricated on glass, flexible perovskite solar cells have a wider range of applications due to their lightweight and bendability , which have attracted great attention. Besides, carbon materials have shown some advantages of abundance, long-term stability and appropriate energy level as top electrode in perovskite solar cells. However, the reports of flexible devices based on carbon electrode are quite rare for the mismatch between the configuration of flexible perovskite solar cells and common carbon electrode techniques. Here, we introduce carbon film electrode into flexible perovskite solar cells for the first time. A new composite carbon film electrode is prepared on a highly conductive and flexible substrate of conductive cloth. Considerable PCEs of 15.37% and 14.05% have been obtained in small area (0.1 cm 2 ) and large area (1 cm 2 ) carbon based flexible devices, respectively. The comparable performance with standard Au electrode device, enhanced stability and suitability for roll-to-roll manufacturing reveals promising application of this low-cost composite carbon electrode.
研究领域:
材料科学
·
可再生能源
·
太阳能电池
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING SCIENCE
·
2025
·
IF 4.3
Yeping Gao,Yu Yao,Chengwu Zhang,Chuanyu Qin,Liming Ren
Conventional monomeric surfactants employed in surfactant − enhanced aquifer remediation (SEAR) face significant limitations, including precipitation propensity, substantial adsorption losses, and suboptimal solubilization of dense non − aqueous phase liquids (DNAPLs). This necessitates the development of novel surfactants with enhanced surface activity and solubilization capacity. Accordingly, a novel sugar − based nonionic Gemini surfactant, APG − EGDE, was specifically synthesized for subsurface application. APG − EGDE features hydrophilic groups derived from two glucose molecules, offering high biodegradability and excellent resistance to low temperatures and ionic interference. The hydrophobic groups were comprised of two long and straight hydrocarbon chains, providing a low critical micelle concentration (CMC: 0.07 mmol/L) and reduced surface/interfacial tension (4.0 mN/m with PCE). And the ether bond (C − O − C) acted as a linker group. Remarkably, homogeneous solutions did not precipitate under extreme groundwater environmental conditions such as high salinity (10 % NaCl or CaCl 2 ) and low temperature (<0 ℃). At 1 g/L, the adsorption loss by medium sand of APG − EGDE was minimal, with only 0.0058 mg/g. APG − EGDE exhibited superior PCE solubilization capacity (10052 mg/L at 40 g/L), exceeding conventional surfactants such as SDS and Tween − 80. One − dimensional column flushing confirmed high PCE removal efficiency after 10 pore volumes. These results showed the Gemini surfactant APG − EGDE serving as a superior surfactant alternative for remediating DNAPL − contaminated aquifers.
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2018
·Vol. 6
·期 10
·4365-4373
·
IF 9.931
Liguo Gao,Likun Wang,Xiaogang Ding,Erling Zhao,Shuzhang Yang,Yingyuan Zhao,Yanqiang Li,Shufeng Wang,Tingli Ma
The power conversion efficiency (PCE) of perovskite solar cells (PSCs) can be improved by introducing appropriate additives into perovskite precursor solutions. However, the exact role and mechanism of additives are still unclear. In this study, self-designed cognition experiments were conducted to improve the hole extraction efficiency, as well as to deeply understand the working principle of additives. A common hole transport material, 2,2′,7,7′-tetrakis[N,N-di(4-methoxyphenyl) amino]-9,9′-spirobifluorene (spiro-OMeTAD), was used as an additive for bulk heterojunction PSCs (BHJ-PSCs). The results showed that the PCE of mesoporous BHJ-PSCs (M-BHJ-PSCs) was enhanced by more than 15% when an extremely low concentration of spiro-OMeTAD additive was added. However, the crystallization of the perovskite was hampered and the recombination risk increased when grain boundaries increased in the perovskite layer. Planar BHJ-PSCs were fabricated to further investigate the role of additives. In comparison with those in planar BHJ-PSCs, the hole extraction efficiency and diffusion length significantly improved in M-BHJ-PSCs due to the transport paths and relay effects caused by the spiro-OMeTAD additive. Subsequently, exact functions and a new working principle of additives in BHJ-PSCs were proposed. This study may extend the possibilities of designing highly efficient PSCs through the promotion of additive research and application.
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
CHEMOSPHERE
·
2019
·
IF 5.108
Qing Wang,Xin Song,Shiyue Tang,Lei Yu
Chlorinated volatile organic compounds, such as tetrachloroethylene (PCE), are the most commonly detected toxic contaminants in groundwater. In this study, the performance of PCE removal by a microbial consortium combined with nZVI modified by layered double hydroxide (nZVI-LDH) was evaluated. The enriched PCE-degrading consortium consisted of 44.49% Clostridium and other potential PCE degraders, and 0.5–2.5 mg/L PCE was completely biodegraded within 4 days. The characterization of nZVI-LDH indicated that LDH was coated on the surfaces of nZVI particles with an increased surface area. The PCE removal kinetics by nZVI-LDH was well described by a second-order model, and the removal rate constant of nZVI-LDH was 0.12 L h/mg, higher than that of native nZVI (0.02 L h/mg). Interestingly, the presence of Cu 2+ improved the removal efficiency of PCE by nZVI-LDH, owing to its role as a catalyst or medium for charge transfer during reduction. Removal of PCE was enhanced by coupling the PCE-degrading consortium and nZVI-LDH. The initial removal of PCE was mainly dominated by the abiotic degradation and adsorption of nZVI-LDH, and biodegradation then played a major role in the exhaustion of nZVI-LDH. These results suggest that biodegradation coupled with nZVI-LDH has a great potential for applications in the remediation of chlorinated-solvent contaminated groundwater.
研究领域:
环境科学
·
化学工程
·
微生物学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
Solar RRL
·
2022
·Vol. 6
·期 9
·2200352
·
IF 9.173
Huan Bi,Gaoyi Han,Mengna Guo,Chao Ding,Shuzi Hayase,Hanjun Zou,Qing Shen,Yao Guo,Wenjing Hou
Though great achievements have been realized in perovskite solar cells (PSCs), there are still some thorny challenges that exist such as: 1) How to minimize the interfacial nonradiative recombination losses; 2) How to balance the power conversion efficiency (PCE) and environmental friendliness of the PSCs. Here, effective top-contacts-interface engineering is developed via using a new multi-active site Lewis base molecule named emtricitabine (FTC). Both, experimental and theoretical results confirm that a strong chemical interaction exists between FTC and Pb 2+ . After FTC treatment, the perovskite thin film has the lower density of defect than the control film, meanwhile, the interfacial hole extraction becomes better due to the more matched energy level. Upon the FTC passivation, the PCE of the PSCs is improved from 20.83% to 22.24%. Simultaneously, the humidity stability of the PSCs is improved after the FTC modification. Last but not least, the unpackaged target film showed less lead leakage than the control film.
研究领域:
材料科学
·
可再生能源
·
化学工程
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）