SOLAR ENERGY MATERIALS AND SOLAR CELLS
·
2018
·
IF 5.018
Haochen Liu,Shang Li,Wei Chen,Dan Wang,Chen Li,Dan Wu,Junjie Hao,Ziming Zhou,Xinzhong Wang,Kai Wang
Luminescent solar concentrator (LSC) integrated with c-Si photovoltaic cells (PV cells) in building integrated photovoltaics (BIPV) could grow up to be an important element of our life for energy harvest in the future. Heavy metal free quantum dots (QDs) are promising for LSC applications, which can be controlled to possess effective large Stokes Shift and low reabsorption of emission that benefit their applications in BIPV. In our work, different amount and size of SiO 2 particles were added to CuInS 2 /ZnS QDs based LSCs to realize highly efficient scattering enhanced LSC (S-LSC) devices. Since SiO 2 particles induced scattering effect, we achieved a power conversion efficiencies (PCE) of 4.20%, which showed an improvement of 60.3% compared with the pure QDs based LSC without SiO 2 particles. This study suggests a new method of scattering enhancement to realize better performance for LSC.
研究领域:
材料科学
·
可再生能源
·
纳米技术
✓ 已验证
产品关联
DOI
高影响因子
CHEMISTRY OF MATERIALS
·
2020
·
IF 9.567
Shuang Li,Xunuo Lou,Xiaotong Li,Jian Zhang,Di Li,Houquan Deng,Jizi Liu,Guodong Tang
Here, we report a remarkable high-average figure of merit (ZT) of 0.73 with the peak ZT of 1.9 in bulk polycrystalline tin selenide (SnSe), generating a high energy conversion efficiency of ∼12.5%. The remarkable high thermoelectric performance results from the enhanced electrical transport properties and reduced lattice thermal conductivity through Schottky vacancies and endotaxial nanostructuring. High angle annular dark field scanning transmission electron microscopy identified amounts of Schottky vacancies and endotaxial PbSe nanoprecipitates present in the SnSe matrix. Schottky vacancies and endotaxial PbSe nanostructures contribute to low lattice thermal conductivity by establishing strong phonon scattering centers. Consequently, an extreme low lattice thermal conductivity of 0.23 W m–1 K–1 was achieved at 873 K. Schottky vacancies lead to the increase in carrier concentration, contributing to the enhancement of electrical conductivity and power factor (PF). The maximum PF reached 7.5 μW cm–1 K–2 at 873 K. In addition to the high peak ZT, a high average ZT and outstanding thermoelectric conversion efficiency were realized, which ensured its huge potential in practical application. This work provides a new strategy for enhancing thermoelectric performance and designing prospective high-performance thermoelectric materials.
研究领域:
材料科学
·
热电学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Xuanling Liu,Han Zhong,Xuanyu Wang,Jianfei Yang,Ziling Zhang,Jianhua Han,Dan Oron,Hong Lin
Regulating strain in perovskite films via utilizing the crystal structure relationship between solid-phase materials (SPMs) and perovskite is an effective method to achieve high-performance perovskite solar cells. It is crucial to investigate and manipulate the heterointerfaces between perovskites and SPMs since the mismatched crystal structure and energy band structure of SPMs will bring recombination sites to the heterointerfaces. In this work, CdS-modified PbS nanosheets (CPS) were prepared through cation exchange with (200)-preferred PbS nanosheets. The wide-band gap CdS charge-blocking layer of CPS nanosheets distributed at the grain boundaries effectively passivates the heterointerfaces in FAPbI3-CPS heterostructures (FAPI-CPS). Further, it potentially blocks carrier transportation and suppresses carrier recombination at grain boundaries and in FAPbI3-PbS nanosheet heterointerfaces. Attributed to the CdS layer, the FAPI-CPS devices achieve an enhanced power conversion efficiency. CPS nanosheets with an interplanar spacing slightly smaller than that of α-FAPbI3 could provide compressive strain to FAPbI3 at the FAPI-CPS heterointerfaces, leading to significantly improved device stability. The unencapsulated FAPI-CPS solar cells maintained 92% of their initial PCE after being stored at 20 ± 5 °C, 20 ± 5% RH for 2500 h.
研究领域:
材料科学
·
能源技术
·
物理化学
✓ 已验证
DOI
高影响因子
Nano Energy
·
2025
·
IF 17.1
Haozhou Huang,Yifan Wu,Yuxin Ma,Peng Xue,Yan Cao,Bo Wang,Xinzhao Zhang,Shudi Wang,Zhenqian Pang,Tengyao Jiang,Yanghua Lu,Gang Tan
Semitransparent organic photovoltaic (ST-OPV) windows have emerged as a promising solution for sustaining renewable energy and enhancing energy efficiency in buildings, for their ability to provide natural lighting while simultaneously generating electricity. However, the building field lacks a unified and comprehensive framework to guide the selection of materials and structural design for ST-OPVs in building envelopes, especially windows. To address this gap, this work establishes a systematic screening framework for ST-OPV device structures, focusing on active layer materials, interface layer materials, and electrode thicknesses. Instead of solely focusing on enhancing light utilization efficiency (LUE), the screening process integrates conventional photovoltaic performance metrics such as power conversion efficiency (PCE) and average visible transmittance (AVT) with essential architectural indices, including color rendering index (CRI), thermal performance, and overall building energy efficiency, ensuring that the designed ST-OPV can be truly applied in real world. The results indicates that ST-OPVs based on the PM6:Y6 system with a wide-bandgap donor showing top-tier performance cannot meet building code requirements for exterior windows, while ST-OPVs using the PCE10–2F:Y6 system with a narrow-bandgap donor can be fabricated into fully code-compliant photovoltaic windows, providing energy-saving benefits in any climate zone worldwide. The correspondingly designed ST-OPV window demonstrates a U-factor of 0.654 W/m 2 K, a solar heat gain coefficient (SHGC) of 0.236, and an AVT/SHGC ratio of 1.356. Compared to conventional commercial windows, this ST-OPV window can achieve annual energy savings of 74.8–239.7 kWh/m 2 around the world, showcasing its potential for real-world energy-efficient building applications.
研究领域:
材料科学
·
能源工程
·
建筑设计
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Ziqi Ren,Qixiang Zhang,Jianyu Yin,Peixue Jia,Wenzhong Lu,Qianqian Yao,Mingfang Deng,Yihua Gao,Nishuang Liu
Reverse electrodialysis (RED) technology, relying on ion-selective permeability membranes (ISPM), offers a direct means of harnessing osmotic energy from the salinity difference between seawater and freshwater. Critical technical challenges include limitations in ISPM's immobile charge carriers, transmembrane ionic internal resistance, and durability in water. Drawing inspiration from the subunit structure of the epithelial sodium channel (ENaC), an ISPM assembled using a supramolecular engineering strategy is introduced. This innovative approach enables the synergistic action of multiple molecular building blocks to mimic the distribution of ENaC subunit structures, strategically planning the placement of immobile charge carriers on nanofluidic channels. The design incorporates nano-confined oxygen-rich functionalized MXene (O-MXene) and high-strength polymer backbone aramid fibers to construct 3D nanofluidic channels with a high surface charge density. Enhanced by a bonding network of sodium carboxymethylcellulose, the ISPM achieved an exceptional output power density of 21.7 W m −2 and 46.0% energy conversion efficiency in a RED half-cell system using natural seawater and river water, surpassing current technologies. This research not only advances RED technology but also provides biomimetic customization concepts for ISPM design across various applications, including flow batteries, fuel cells, and related fields.
研究领域:
能源科学
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材料科学
·
仿生学
✓ 已验证
产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2024
·
IF 5.7
Rui Lin,Hui Zhou,Xuee Xu,Xinhua Ouyang
Solid additives have been demonstrated as a simple and effective approach to improve the performance of organic solar cells (OSCs). The exploitation of excellent solid additive is an important aspect to obtain efficient OSC. This research designs and synthesizes a novel solid additive IDT(BDT-IC) 2 as the sensitizer for OSCs. The IDT(BDT-IC) 2 is an A-π- d -π-A type molecule, which possesses a highly planar π-conjugated structure. This molecule exhibits a complementary light absorption with suitable energy levels, which meets the requirement of a qualified sensitizer. It helps to enhance the external quantum efficiency spectrum of the device. Thus, an increased photocurrent is achieved. The addition of IDT(BDT-IC) 2 promotes the formation of a cascade energy level alignment and tunes the miscibility of the active layer. Both the exciton dissociation and electron transportation are improved, which enhances the fill factor. As a result, the average power conversion efficiency (PCE) of the PM6:Y6 OSC is increased from 15.75 % of the control device to 16.34 % by incorporating merely 0.25 wt% of IDT(BDT-IC) 2 . And the highest PCE with a value of 16.70 % is obtained. This research offers a facile and effective strategy for highly efficient OSCs by applying solid additive as the sensitizer.
研究领域:
材料科学
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能源科学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Materials Chemistry A
·
2013
·Vol. 1
·期 15
·4858-4863
·
IF 0
Fang Zhang,Ke-Jian Jiang,Jin-Hua Huang,Chun-Chun Yu,Shao-Gang Li,Ming-Gong Chen,Lian-Ming Yang,Yan-Lin Song
A novel compact diketopyrrolopyrrole (DPP) dye was designed and synthesized using DPP core as a bridge to connect bis(4-tert-butylphenyl)phenylamine and cyanoacetic acid units with the D–π–A configuration, and employed as a sensitizer in dye-sensitized solar cells, giving a high power conversion efficiency of 8.61% under AM 1.5 conditions.
研究领域:
材料科学
·
能源科学
·
化学
✓ 已验证
DOI
Solar RRL
·
2020
·Vol. 4
·期 10
·2000268
·
IF 7.527
Hui Li,Longwei Yin
All inorganic mixed-halide CsPbI 2 Br perovskites with suitable bandgap and superior thermal durability have ignited rising interests in the field of perovskite solar cells (PSCs). However, the serious energy losses derived from deleterious trap-assisted defects–induced notorious nonradiative recombination and inferior moisture durability are still the primary hindrance on the way to develop high-performance CsPbI 2 Br PSCs. Herein, a novel passivation strategy is presented by introducing dual-functionalized bidentate molecule 2-(2′-thienyl)pyridine (2-ThPy) to modulate perovskite crystallization and passivate halogen vacancy defects. Compared with monodentate counterparts, 2-ThPy can anchor Pb 2+ sites via S and N atomic bonding simultaneously, and the synthesized CsPbI 2 Br films exhibit enlarged grain size, show advantages to passivate defect states, and dramatically reduce trap density, thereby lessening the detrimental carrier recombination. Consequently, a champion power conversion efficiency (PCE) of 12.69% with negligible hysteresis is delivered for the fabricated CsPbI 2 Br PSCs treated with 2-ThPy. Moreover, the moisture stability of CsPbI 2 Br PSCs with 2-ThPy is also greatly enhanced, and the device without encapsulation retains 92% of initial PCE value after 30 days aging under 25 °C and 40% relative humidity in ambient environment. The bidentate molecules passivation strategy paves a promising avenue to implement efficient and stable inorganic PSCs.
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
CHEMISTRY OF MATERIALS
·
2016
·
IF 9.407
Wei Huang,Meilin Li,Luozheng Zhang,Tingbin Yang,Zhi Zhang,Hao Zeng,Xing Zhang,Li Dang,Yongye Liang
Recent advances in the power conversion efficiency (PCE) of polymer solar cells (PSCs) have demonstrated their potential for alternative photovoltaic technology. Besides photovoltaic performance, material cost and device fabrication process are among the key factors for practical applications. Herein, we report a facile molecular engineering approach with 4-methoxy modified thiophene as the conjugated side chain for polymer donors, which afforded lower highest occupied molecular orbital (HOMO) energy level and enhanced interchain interactions. Therefore, the corresponding PSCs exhibit enhanced open-circuit voltage and PCE compared with the counterparts with thiophene as the conjugated side chain. When fabricated from a nonhalogenated solvent without any additives, over 8% efficiency could be achieved in a representative polymer, PMOT5. Both the synthetic simplicity of materials and high performance from environmentally friendly solvent improve the accessibility 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
CHEMISTRY OF MATERIALS
·
2014
·
IF 8.535
Yi-Xiu Wang,Ming Wei,Feng-Jia Fan,Tao-Tao Zhuang,Liang Wu,Shu-Hong Yu,Chang-Fei Zhu
Cu2ZnSnS4 (CZTS) nanocrystals with two typical structures, i.e., zinc blende (ZB)-derived and wurtzite (WZ) crystal frameworks, have been selectively synthesized via a solution-based route. Initially, Cu2SnS3 (CTS) nanoparticles with two different phases, i.e., zinc blende- and wurtzite-derived, can be prepared with different S sources and temperatures. Afterward, addition of the Zn precursor to the CTS matrix results in the substitutions of Cu and Sn cations, yielding CZTS with desirable phases. This method can be extended to the synthesis of other similar quaternary chalcogenide nanocrystals. The cation exchange method described here provides a convenient approach for fine-tuning the nanocrystal’s cation ratio, which enables us to optimize the solar absorber layer compositions and get a power conversion efficiency of 2.89% in copper-poor and zinc-rich devices. The capability to synthetically access stable phases with controllable morphologies and compositions demonstrates that the developed cation exchange method is powerful as a manufacturing technique for photovoltaic devices.
研究领域:
材料科学
·
太阳能电池技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2017
·
IF 7.504
Yafang Qi,Qingwen Tian,Yuena Meng,Dongxing Kou,Zhengji Zhou,Wenhui Zhou,Sixin Wu
The partial substitution of Cu+ with Ag+ into the host lattice of Cu2ZnSn(S,Se)4 thin films can reduce the open-circuit voltage deficit (Voc,deficit) of Cu2ZnSn(S,Se)4 (CZTSSe) solar cells. In this paper, elemental Cu, Ag, Zn, Sn, S, and Se powders were dissolved in solvent mixture of 1,2-ethanedithiol (edtH2) and 1,2-ethylenediamine (en) and used for the formation of (Cu1–xAgx)2ZnSn(S,Se)4 (CAZTSSe) thin films with different Ag/(Ag + Cu) ratios. The key feature of this approach is that the impurity atoms can be absolutely excluded. Further results indicate that the variations of grain size, band gap, and depletion width of the CAZTSSe layer are generally determined by Ag substitution content. Benefiting from the Voc enhancement (∼50 mV), the power conversion efficiency is successfully increased from 7.39% (x = 0) to 10.36% (x = 3%), which is the highest efficiency of Ag substituted devices so far.
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
Nano Energy
·
2017
·
IF 12.343
Guoshuai Wang,Huiyun Wei,Jiangjian Shi,Yuzhuan Xu,Huijue Wu,Yanhong Luo,Dongmei Li,Qingbo Meng
Aiming at improving the cell performance of colloidal CuInS 2 (CIS) quantum dot sensitized solar cells (QDSCs), a modified synthetic method has been developed to prepare CIS quantum dots (QDs), and Cu/In non-stoichiometric ratios of CIS QDs have been carefully controlled for the first time. It is found that, with the amount of In element increasing, the short-circuit photocurrent density ( J sc ), open-circuit voltage ( V oc ) and fill factor ( FF ) of CIS QDSCs will gradually increase, leading to the cell performance enhanced. Up to 8.54% PCE has been achieved when the Cu/In precursor molar ratio is 1/4, which is a new record for the CIS-based solar cells. Electrochemical impedance analysis, open-circuit voltage-decay (OCVD) and time-resolved photoluminescence analyses further confirm that In-rich CIS QDs can bring about surface defect states significantly reduced, thus leading to the charge recombination at TiO 2 /CIS/electrolyte interfaces efficiently inhibited. Interfacial electron recombination mechanism of the solar cells is proposed that photo-generated carrier recombination in the cell is mainly dominated by the electron transfer process from the conduction band of TiO 2 to unoccupied defect states of CIS, which has a great influence on the FF of the device. This work provides a new and simple way to reduce the loss of photo-generated carriers, improve the interfacial carrier collection and achieve highly efficient QDSCs.
研究领域:
材料科学
·
能源科学
✓ 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）