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Perovskite solar cells: recent progress and strategies developed for minimizing interfacial recombination

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Frontiers of Materials Science 2022年第2期16卷 41-54页

作者： Rengasamy DHANABAL Suhash Ranjan DEY Combinatorial Materials Laboratory Department of Materials Science and Metallurgical EngineeringIndian Institute of Technology HyderabadKandiSangareddy 502284TelanganaIndia

Organometallic perovskite is a new generation photovoltaic material with exemplary properties such as high absorption co-efficient,optimal bandgap,high defect tolerance factor and long carrier diffusion ***,suitable electrodes and charge transport materials are required to fulfill photovoltaic processes where interfaces between hole transport material/perovskite and perovskite/electron transport material are affected by phenomena of charge carrier separation,transportation,collection by the interfaces and band *** on recent available literature and several strategies for minimizing the recombination of charge carriers at the interfaces,this review addresses the properties of hole transport materials,relevant working mechanisms,and the interface engineering of perovskite solar cell(PSC)device architecture,which also provides significant insights to design and development of PSC devices with high efficiency.

关键词： light absorption p–i–n and n–i–p structure interface recombination build-in potential perovskite solar cell

A novel way towards CdS sensitized TiO_2 nanoparticles

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Chinese Chemical Letters 2010年第8期21卷 1003-1006页

作者： Jianhua Wang Qian Ye Xiaobo Wang Feng Zhou State Key Laboratory of Solid Labrication Lanzhou Institute of Chemical Physics Chinese Academy of Sciences Lanzhou 730000 China Graduate School of Chinese Academy of Sciences Beijing 100039 China Navy institute of Logistic Technology and Equipment Beijing 100072 China

Polymethyl methacrylate cadmium was grafted on TiO2 surface via the surface initiated atomic transfer radical polymerization of methyl methacrylate cadmium from a surface tether *** coordinated cadmium as the source precursor reacts with H2S generates CdS nanoscrystal on TiO2 *** grain size of CdS is about 5 nm and stabilized by tether polymer *** light absorption of CdS/TiO2 is expanded to visible light region.

关键词： Titanium oxide CdS nanocrystal Sensitization light absorption

Measurement of the third order nonlinear optical coefficients of GaP and chirp parameter of laser pulse

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Chinese Optics Letters 2004年第6期2卷 354-355页

作者：桑海宇王维江林洁丘志仁周建英 State Key Laboratory of Optoelectronic Materials and Technologies Sun Yat-Sen University. Guangzhou 110275 State Key Laboratory of Optoelectronic Materials and Technologies Sun Yat-Sen University. Guangzhou 110275he spectral resolved femtosecond pump-probe experiment is applied to measure the third order nonlinear refractive index coefficient two-photon absorption coefficient of GaP crystal and the chirp parameter of the input laser pulses. The results show that nonlinear refractive index coefficient is 2 ×10 -18 m2/W two-photon absorption coefficient is 2×10-11 m/W at wavelength of 783.5 nm and the chirp parameter of laser pulse is 1×1025 s-2. Furthermore the mechanism of nonlinear refraction due to two-photon absorption in GaP crystal and experimental results are discussed.

The spectral resolved femtosecond pump-probe experiment is applied to measure the third order nonlinear refractive index coefficient, two-photon absorption coefficient of GaP crystal, and the chirp parameter of the input laser pulses. The results show that nonlinear refractive index coefficient is 2 × 10 -18 m2/W, two-photon absorption coefficient is 2×10-11 m/W at wavelength of 783.5 nm, and the chirp parameter of laser pulse is 1×1025 s-2. Furthermore, the mechanism of nonlinear refraction due to two-photon absorption in GaP crystal and experimental results are discussed.

关键词： Crystals Laser pulses light absorption Measurements Nonlinear optics Optical communication Phosphates Refractive index

Theoretical Study of Local Surface Plasmon Resonances on a Dielectric-Ag Core-Shell Nanosphere Using the Discrete-Dipole Approximation Method

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Chinese Physics Letters 2015年第9期32卷 46-49页

作者：马业万吴兆旺章礼华刘万芳张杰 School of Physics and Electric Engineering Anqing Normal University

The local surface plasmon resonances （LSPRs） of dielectric-Ag core-shell nanospheres are studied by the discrete- dipole approximation method. The result shows that LSPRs are sensitive to the surrounding medium refractive index, which shows a clear red-shift with the increasing surrounding medium refractive index. A dielectric-Ag core-shell nanosphere exhibits a strong coupling between the core and shell plasmon resonance modes. LSPRs depend on the shell thickness and the composition of dielectric-core and metal-shell. LSPRs can be tuned over a longer wavelength range by changing the ratio of core to shell value. The lower energy mode w- shows a red-shift with the increasing dielectric-core value and the inner core radius, while blue-shifted with the increasing outer shell thickness. The underlying mechanisms are analyzed with the plasmon hybridization theory and the phase retardation effect.

关键词： SURFACE plasmon resonance SILVER nanoparticles -- Spectra REFRACTIVE index light absorption PERMITTIVITY FINITE element method

Optical management in organic photovoltaic devices

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Carbon Energy 2021年第1期3卷 4-23页

作者： Cheng Yang Chao Zhao Yang Sun Qicong Li MdRasidul Islam Kong Liu Zhijie Wang Shengchun Qu Zhanguo Wang Key Laboratory of Semiconductor Materials Science Beijing Key Laboratory of Low Dimensional Semiconductor Materials and DevicesInstitute of SemiconductorsChinese Academy of SciencesBeijingChina Center of Materials Science and Optoelectronics Engineering University of Chinese Academy of SciencesBeijingChina

Due to their potentials in light‐weight,flexible,and semitransparent devices,organic photovoltaics are of great significance in the field of renewable ***,the narrow intrinsic absorption spectrum of organic materials hinders the full utilization of solar *** fabricate a highly efficient opaque solar cell,it is greatly necessary to modify the optical properties of the device to improve light *** addition,the growing interest in building‐integrated photovoltaics drives the development of semitransparent *** preparation of semitransparent solar cells with excellent performance imposes high requirements on the high efficiency and appropriate visible light transmittance of effective optical *** this review,the recent research progress of optical management in organic photovoltaics is reviewed,including the design of light‐absorbing materials,the modification of different layers,adding a lighttrapping structure,and changing the light absorption capabilities of specific materials,so as to provide strategies of how to improve the performance of organic photovoltaic devices and present the prospect of the area.

关键词： light absorption light transmittance light trapping organic photovoltaic devices

Photoinduced charge injection in the metal/organic interface studied by transient photovoltage measurements with bias

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Science China(Physics,Mechanics & Astronomy) 2013年第10期56卷 2012-2015页

作者： WU Bo LI WenBin YU HaoMiao YOU YinTao CHEN XiaoQing HE Yun HOU XiaoYuan Key Laboratory of Micro and Nano Photonic Structures(Ministry of Education) State Key Laboratory of Surface PhysicsFudan University

Transient photovoltage of ITO/organic/Al cells is studied under different bias polarities and *** is found that for an ITO/NPB/Al cell,light incidence on the Al side induces more bias-dependent transient photovoltage variation when the photovoltage is positive than when it is ***,for an ITO/C60 /Al cell,the variation characteristics of transient photovoltage is *** results support the previously proposed mechanism that Al could inject charges into the organic layer upon photon excitation,indicating that the absorption of electrode can also contribute to photovoltaic effect.

关键词： light absorption charge injection organic solar cells photovoltaic effects

Er^(3+)/Yb^(3+) codoped phosphate glass laser end-pumped by laser diode

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Chinese Optics Letters 2006年第4期4卷 228-229页

作者：赵士龙李顺光胡丽丽张在宣 College of Information Engineering China Jiliang University Hangzhou 310018 Shanghai Institute of Optics and Fine Mechanics Chinese Academy of Sciences Shanghai 201800

An Er^3＋/yb^3＋ phosphate laser glass was fabricated and characterized. According to McCumber theory, the stimulated emission cross-section of Er^3＋ ions at 1533 nm calculated by absorption spectrum was 0.84 × 10^-20 cm^2, and the fluorescence lifetime of ^4I13/2 level was 8.5 ms. Continuous wave （CW） laser operation of this Er^3＋/yb^3＋ phosphate glass pumped by laser diode （LD） was demonstrated at room temperature. The maximum output power of 80 mW and slope efficiency of 16.5% were obtained.

关键词： Efficiency Erbium light absorption Phosphates Pumping (laser) Semiconductor lasers Ytterbium

Research on performance of hybrid organic dyes-sensitized solar cell

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Chinese Optics Letters 2006年第6期4卷 357-359页

作者：孙磊苑伟政乔大勇 MEMS/NEMS Laboratory Northwestern Polytechnical University MEMS/NEMS Laboratory Northwestern Polytechnical University

The hybrid sensitizer rhodamine B and coumarin or eosin and coumarin is used to sensitize nanocrystalline porous films. absorption of the nanoerystalline photovoltaic cell （NPC） is improved in visible light. The performance of these cells is more effective than that of cells sensitized only by sensitizer rhodamine B or eosin. In the simulative solar light, cell sensitized by hybrid sensitizer rhodamine B and coumarin can get open circuit voltage （VOC） of 550 mV and short circuit current （ISC） of 0.1375 mA/cm^2.

关键词： Dyes Electric potential light absorption Photovoltaic cells Porous materials Short circuit currents

Damage on HfO_2/SiO_2 high-reflecting coatings under single and multiple Nd:YAG laser pulse irradiation

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Chinese Optics Letters 2005年第3期3卷 179-180页

作者：高卫东王涛赵元安邵建达 Shanghai Institute of Optics and Fine Mechanics

The single- and multi-shot damage behaviors of HfO2/SiO2 high-reflecting (HR) coatings under Nd:YAG laser exposure were investigated. Fundamental aspects of multi-shot laser damage, such as the instability due to pulse-to-pulse accumulation of absorption defect and structural defect effect, and the mechanism of laser induced defect generation, are considered. It was found in multi-shot damage, the main factors influencing laser-induced damage threshold (LIDT) are accumulation of irreversible changes of structural defects and thermal stress that induced by thermal density fluctuations.

关键词： Defects Irradiation Laser damage Laser pulses light absorption Neodymium lasers Thermal stress