Journal of Materials Chemistry A
·
2024
·
IF 10.7
Maoxia Xu,Rui Liu,Haoran Ye,Haorong Ren,Jinyu Li,Chen Deng,Zetan Zhang,Chengbin Yang,Kexin Hu,Xiaoran Sun,Hua Yu
In wide-bandgap (WBG) perovskite solar cells (PSCs), the energy level misalignment between the hole transport layer (HTL) and the perovskite layer, coupled with the high-density defects at their buried interface, causes severe non-radiative recombination within PSCs. Herein, CuanCl (carbamoyl-guanidine amidino urea salt, hydrochloride salt) with multifunctional molecular groups is introduced to optimize the WBG perovskite/HTL interface. This strategic introduction aims to suppress non-radiative recombination, consequently mitigating open-circuit voltage loss (Vloss). The findings demonstrate the bifunctional chemical passivation effect of the carbonyl (CO) and imine cations (NH+–) within CuanCl molecules on surface defects of perovskite, effectively suppressing diverse defect-assisted non-radiative recombination. Furthermore, the surface-bound CuanCl on the perovskite provides supplementary electronic states at the valence band maximum, achieving a more harmonized energy level alignment and effectively inhibiting charge recombination at the interface. The resultant CuanCl-treated WBG PSCs produce a high open-circuit voltage of 1.27 V, and a decent fill factor of 77.28%, which leads to a power conversion efficiency of 19.36%. Furthermore, the devices exhibit superior stability, maintaining 84% of their initial efficiency after 1000 hours in air with a humidity of 40%. This work provides new insight for optimizing a defective interface with the molecular engineering approach for fabricating efficient and stable WBG PSCs.
研究领域:
材料科学
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能源工程
✓ 已验证
产品关联
DOI
高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
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2025
·
IF 21.1
Yong Li,Yuanyuan Wu,Dongting Wang,Xinjia Zhang,Tianyuan Xiao,Jianhua Zheng,Guoqiang Zhang
Non-radiative and radiative recombination jointly determine the photogenerated-carrier separation efficiency of photocatalysts. However, linear conjugated polymer photocatalysts (LCPP) still suffer from serious non-radiative recombination caused by exciton-phonon coupling and radiative recombination originating from exciton radiative transition. Herein, we report a strategy to simultaneously suppress non-radiative and radiative recombination in LCPP, which successfully addresses this drawback. Firstly, we successfully synthesized 2D Poly(4,7-dithienyl-2,1,3-benzothiadiazole) (PDTBT) with N…S intramolecular conformational locks to suppress non-radiative recombination. The obtained PDTBT exhibits largely expanded absorption range and efficiently suppressed exciton–phonon coupling. Subsequently, we constructed 2D/2D PDTBT/graphitic carbon nitride (CN) polymer heterojunctions to suppress radiative recombination, and the obtained 25PDTBT/CN exhibits hydrogen production activity up to 17.09 mmol h −1 g −1 with the apparent quantum yields ( AQYs ) of 13.65 % at 700 nm and 4.36 % at 750 nm. The excellent photocatalytic activities are proved to originate from the effectively suppressed exciton-phonon coupling by N…S intramolecular conformational locks and the efficient photogenerated-carrier transfer via van der Waals forces between PDTBT and CN. This research offers a practical approach for suppressing non-radiative and radiative recombination of linear conjugated polymer and constructing efficient 2D/2D polymer heterojunctions.
研究领域:
材料科学
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化学工程
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纳米技术
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物理化学
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高分子科学
✓ 已验证
产品关联
DOI
高影响因子
Surfaces and Interfaces
·
2024
·
IF 5.7
Jinhuan Jiang,Chenyang Shi,Lixin Song,Pinfan Du,Wen Guo,Jie Xiong
Non-radiative recombination due to high-density defects at the bottom of the perovskite layer and in the SnO 2 ETL layer is not favourable for charge transfer. In this work, disodium diphenylsulfone-4,4′-dichloro-3,3′-disulfonate (SDCDPS) was introduced into SnO 2 solution to prepare a high-quality pinhole-free SnO 2 film. The sulfonate of SDCDPS collaborates with diphenylsulfone to passivate uncoordinated Sn 4+ in SnO 2 ETL, which will reduce the work function (W F ) in the SnO 2 , increasing the conduction of SnO 2 film and reducing the charge recombination of pre-buried interface. Besides, the sulfonate and diphenysulfone groups also passivate the uncoordinated Pb 2+ in perovskite to increase the crystallinity of perovskite and reduce non-radiative recombination. After SDCDPS modification, the power conversion efficiency of perovskite solar cells significantly increased from 18.2% to 21.2% with hysteresis factor decreasing from 10.4% to 3.35%. Also, the modified device shows well stability due to the enhancement of perovskite crystallization and the reducing defects. Under relative humidity of ∼60%, the PCE of the unencapsulated device modified by SDCDPS remains at 81% of the initial device after 720h. This work offers a dependable method for enhancing the quality of the buried interface in PSC and to pursue productive and consistent devices.
研究领域:
材料科学
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能源科学
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光电技术
✓ 已验证
产品关联
DOI
高影响因子
RARE METALS
·
2025
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IF 11
Xu Bao-Yuan,Meng Fan-Xing,Qin Pei-Chen,Liu Hai-Di,Zhao Yu-Yan,Gao Han-Fei,Su Hui-Xue,Li Jing,Dong Hai-Yun,Wu Yu-Chen,Zhang Chun-Huan,Zhao Yong-Sheng,Zhang Jia-Tao
Metal halide perovskites have rapidly emerged as outstanding semiconductors for laser applications. Surface plasmon resonances of metals offer a platform for improving the perovskite lasing properties of metal halide perovskites by accelerating radiative recombination. However, the constraint on degrees of freedom of perovskite-metal interactions in two dimensions keeps us from getting a full picture of plasmon-involved carrier dynamics and reaching the optimum perovskite lasing performance. Here we report a strategy of synthesizing quantitative coassemblies of perovskite and metal nanocrystals for studying the effect of surface plasmons on carrier dynamics in depth and exploring plasmon-enhanced perovskite lasing performance. Within the coassembly, each metal nanocrystal supports localized surface plasmon resonances capable of accelerating radiative recombination of all adjacent perovskite nanocrystals in three dimensions. The quantitative coassemblies disclose the evolution of radiative and nonradiative recombination processes in perovskite nanocrystals with the plasmon modes, identifying an optimal metal nanocrystal content for fulfilling the highest radiative efficiency in perovskite nanocrystals. By virtue of accelerated radiative recombination, the coassemblies of perovskite and metal nanocrystals allowed for the construction of microlaser arrays with enhanced performance including low thresholds and ultrafast outputs. This work fundamentally advances the perovskite-metal systems for plasmonically enhancing perovskite optoelectronic performance. Graphical
研究领域:
材料科学
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光学
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纳米技术
✓ 已验证
产品关联
DOI
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2022
·Vol. 32
·期 39
·2206838
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IF 19.924
Jingwei Zhu,Benlin He,Wenyu Zhang,Rui Tui,Haiyan Chen,Yanyan Duan,Hao Huang,Jialong Duan,Qunwei Tang
One of the key problems to improving the performance of a typical perovskite solar cell (PSC) is to minimize the defect-determined nonradiative recombination. So far, the cutting-edge strategies mainly focus on the film-scale defect manipulation at grain boundaries and surfaces by trial-and-error, but the intrinsic passivation mechanism and fundamental guideline in the perspective of crystal lattices are still unclear. Herein, a much lower defect formation energy of Pb Br antisite defect at (110) plane than that at (h00) planes is demonstrated by theoretically studying the crystal plane-dependent defect density in an inorganic CsPbBr 3 film, and then the authors precisely control the plane growth by selectively anchoring (pseudo-) halide anions from ionic liquids to (110) plane. Because of the different adsorption energies on various planes, the growth of defective (110) plane is suppressed, leading to the formation of (h00) plane-oriented film. Finally, the all-inorganic CsPbBr 3 PSC passivated by ionic liquid EMImCl delivers the best efficiency of 10.71% with an open-circuit voltage up to 1.650 V. This work provides an in-depth insight into defect formation and passivation mechanism to stabilize perovskite photovoltaics.
研究领域:
材料科学
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光伏技术
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物理化学
✓ 已验证
DOI
高影响因子
Solar RRL
·
2025
·Vol. 9
·期 7
·2400901
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IF 4.7
Zhengjie Xu,Jianing Wang,Qiang Lou,Yufeng Jin,Hong Meng,Hang Zhou
Poly(3-hexylthiophene) (P3HT) has attracted significant interest due to its cost-effective synthesis, high purity, and stable film properties. However, the efficiency of perovskite solar cells is limited by energy-level mismatches and nonradiative recombination at the P3HT/perovskite interface. In this study, we introduce the 2,7-dimetapyridinebenzo[4,5]thieno[3,2-b]benzofuran (Mpy-BTBF) small molecule, which features extended π -conjugation and lone pair electrons from oxygen and sulfur atoms. Incorporating Mpy-BTBF into P3HT (M-P3HT) improves charge transport and passivates iodine-related defects, achieving a power conversion efficiency (PCE) of 16.36%, surpassing the pristine P3HT-based device (14.49%). With further Li salts doping, the champion PCE increased to 21.24 from 17.30%. Finally, M-P3HT-based devices maintained over 70% of their efficiency after 600 h of aging at 60% relative humidity and 60°C.
研究领域:
材料科学
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光伏技术
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有机电子学
✓ 已验证
DOI
高影响因子
ACS Applied Energy Materials
·
2021
·
IF 6.024
Deyu Gao,Mengjia Li,Liqun Yang,Chenglin Wang,Xueni Shang,Xiaohui Ma,Cuncun Wu,Boxue Zhang,Hongwei Song,Cong Chen
Defects in the perovskite photoactive layer will cause severe non-radiative recombination and lead to severe efficiency loss and stability degradation. In this work, a type of cation, 3-APA+, was added to the perovskite precursor to passivate the cation defect and interface/surface defects. Our results reveal that incorporating 3-APA+ with amino and carboxyl functional groups could enhance electronic properties of the interfacial and bulk due to a more efficient charge transfer between the bulk and interfaces and the reduced electronic defect energy levels. The hybrid cation-based perovskite film exhibits a longer photoluminescence lifetime and a lower density of trap states, indicating the effectively passivated vacancies, thus reducing the non-radiative recombination pathway. In addition, the bifunctional group can cross-link the perovskite grains through hydrogen bonds to form a dense perovskite film with a larger grain size. Consequently, the best performing devices with an optimized power conversion efficiency of 20.4% showed an efficiency loss of only 7% at a maximum power tracking of 2000 s at full sunlight intensity. Therefore, directly adding 3-APA+ to the precursor can provide ideas for passivating defects in the perovskite material and improving its stability.
研究领域:
材料科学
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光电子学
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能源技术
✓ 已验证
产品关联
DOI
高影响因子
ACS Applied Energy Materials
·
2024
·
IF 5.4
Panli Zhang,Zezhang Wang,Tianfei Xu,Nan Li,Shengzhong Liu,Wanchun Xiang,Xing Zhang
Metal-halide inorganic perovskites have gained great interest due to their excellent thermal stability and adjustable bandgaps for fabricating tandem solar cells. However, challenges such as significant nonradiative recombination by perovskite interfacial defects and unpleasant moisture stability have forced further improvements in the power conversion efficiency (PCE) and stability of inverted inorganic perovskite solar cells (PSCs). Herein, 3,5-bis(trifluoromethyl)benzylamine (TFBA) as a surface modifier was used to achieve these goals. It was found that the amino group in TFBA can provide electrons to coordinate with the undercoordinated Pb2+ on the surface of inorganic perovskite, thus mitigating surface defects. Moreover, TFBA contains two trifluoromethyl groups with hydrophobic properties, which can effectively prevent moisture from intrusion. Consequently, TFBA treatment resulted in remarkable improvement of the device open-circuit voltage by 110 mV, leading to a PCE of 20.4% under 100 mW cm–2 illumination, superior to that of the control cell (17.8%). The unencapsulated devices without treatment and treatment with TFBA can preserve their initial PCEs of 65 and 90%, respectively, after aging for 1150 h under ambient conditions.
研究领域:
材料科学
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能源技术
✓ 已验证
产品关联
DOI
高影响因子
Nature Communications
·
2025
·Vol. 16
·期 1
·1-10
·
IF 15.7
Bi Yuhe,Sun Jianhui,Cao Sheng,Li Qiuyan,Zheng Jinju,Yuan Xi,Wang Yunjun,Zou Bingsuo,Zhao Jialong
As next-generation display technologies, eco-friendly colloidal quantum dot light-emitting diodes have drawn great attention due to their excellent luminescence properties, along with their rapid development. However, practical applications of eco-friendly quantum dot light-emitting device remain challenging, primarily due to the inferior performance of green device, which still lag behind their red and blue counterparts. Herein, we present efficient green device based on interfacial potential-graded ZnSeTe quantum dots. Our findings show that this potential-graded structure alleviates interfacial lattice mismatch and strain, reducing structural deformation and misfit defects. The smoothed interfacial potential suppresses the nonradiative recombination processes, particularly Auger recombination revealed by excitation-intensity dependent ultrafast transient absorption kinetics. Consequently, the interfacial potential-graded quantum dots demonstrate highly efficient green quantum dot light-emitting diodes, with a peak external quantum efficiency of 21.7% at 520 nm and a corresponding current efficiency of 75.7 cd A −1 .
研究领域:
材料科学
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光电子学
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纳米技术
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ACS Applied Materials & Interfaces
·
2024
·
IF 8.3
Bo Yu,Zhiwei Xu,Hualin Liu,Yumeng Liu,Kanghua Ye,Zhiquan Ke,Jiankai Zhang,Huangzhong Yu
Despite the fact that perovskite solar cells (PSCs) are widely popular due to their superb power conversion efficiency (PCE), their further applications are still restricted by low stability and high-density defects. Especially, the weak binding and ion–electron properties of perovskite crystals make them susceptible to moisture attack under environmental stress. Herein, we report an overall sulfidation strategy via introduction of 1-pentanethiol (PT) into the perovskite film to inhibit bulk defects and stabilize Pb ions. It has been confirmed that the thiol groups in PT can stabilize uncoordinated Pb ions and passivate iodine vacancy defects by forming strong Pb–S bonds, thus reducing nonradiative recombination. Moreover, the favorable passivation process also optimizes the energy-level arrangement, induces better perovskite crystallization, and enhances the charge extraction in the full solar cells. Consequently, the PT-modified inverted device delivers a champion PCE of 22.46%, which is superior to that of the control device (20.21%). More importantly, the PT-modified device retains 91.5% of its initial PCE after storage in air for 1600 h and over 85% of its initial PCE after heating at 85 °C for 800 h. This work provides a new perspective to simultaneously improve the performance and stability of PSCs to satisfy their commercial applications.
研究领域:
材料科学
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能源科学
✓ 已验证
DOI
PubMed
高影响因子
ADVANCED MATERIALS
·
2023
·Vol. 36
·期 1
·2305841
·
IF 29.4
Xinnian Liu,Zhiyuan Cai,Lei Wan,Peng Xiao,Bo Che,Junjie Yang,Haihong Niu,Huan Wang,Jun Zhu,Yi-Teng Huang,Huimin Zhu,Szymon J. Zelewski,Tao Chen,Robert L. Z. Hoye,Ru Zhou
Sb 2 S 3 is a promising environmentally friendly semiconductor for high performance solar cells. But, like many other polycrystalline materials, Sb 2 S 3 is limited by nonradiative recombination and carrier scattering by grain boundaries (GBs). This work shows how the GB density in Sb 2 S 3 films can be significantly reduced from 1068 ± 40 to 327 ± 23 nm µm −2 by incorporating an appropriate amount of Ce 3+ into the precursor solution for Sb 2 S 3 deposition. Through extensive characterization of structural, morphological, and optoelectronic properties, complemented with computations, it is revealed that a critical factor is the formation of an ultrathin Ce 2 S 3 layer at the CdS/Sb 2 S 3 interface, which can reduce the interfacial energy and increase the adhesion work between Sb 2 S 3 and the substrate to encourage heterogeneous nucleation of Sb 2 S 3 , as well as promote lateral grain growth. Through reductions in nonradiative recombination at GBs and/or the CdS/Sb 2 S 3 heterointerface, as well as improved charge-carrier transport properties at the heterojunction, this work achieves high performance Sb 2 S 3 solar cells with a power conversion efficiency reaching 7.66%. An impressive open-circuit voltage ( V OC ) of 796 mV is achieved, which is the highest reported thus far for Sb 2 S 3 solar cells. This work provides a strategy to simultaneously regulate the nucleation and growth of Sb 2 S 3 absorber films for enhanced device performance.
研究领域:
材料科学
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光伏技术
·
半导体物理
✓ 已验证
DOI
高影响因子
Frontiers in Chemistry
·
2022
·
IF 5.545
Zang Shuaipu,Zhang Xuhui,Sun Yingying,Li Ning,Wang Lei,Li Lin Song
Harnessing environment-friendly and low-cost multinary Cu-In-Zn-S quantum dots (QDs) as emitters for light-emitting diodes (LEDs) has attracted great attention for display and lighting application. However, suboptimal QD structure is a huge obstacle, which results in serious non-radiative recombination and efficiency roll-off. Herein, we synthesized structure-tailored Cu-In-Zn-S/ZnS//ZnS QDs by improving the reactivity of shell growth by 2-ethylhexanoic acid (EHA) ligands. The EHA-assisted shell growth can boost an extended alloyed layer at the core-shell interface and a smoothed confinement barrier, which effectively passivate the interface defects and suppress Förster resonance energy transfer (FRET) process. These synthesized QDs display a bright photoluminescence emission (quantum yield of 83%) and a larger size of 8.4 nm. Moreover, the resulting LEDs based on the EHA-assisted QDs exhibit a maximum luminance of 8074 cd/m2, and a current efficiency of 7.3 cd/A with a low efficiency roll-off. Our results highlight a remarkable ligand strategy to tailor the QD structure for high performance QD-based LEDs.
研究领域:
材料科学
·
光学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）