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Journal of Energy Chemistry 2025年第1期100卷 59-65页

作者： Mengyu Xu Shaocong Yan Ting Liang Jia Jia Shengjie Yuan Dongxing Kou Zhengji Zhou Wenhui Zhou Yafang Qi Yuena Meng Litao Han Sixin Wu key laboratory for Special Functional materials of MOE National & Local Joint Engineering Research Centre for High-efficiency Display and Lighting Technology School of Nanoscience and Materials Engineering Henan University

Solution-processed Cu（In,Ga）Se2（CIGS） solar cells suffer from serious carrier recombination and power conversion efficiency（PCE） loss because of the poor film properties and easy formation of ***, we propose Ag&Se co-selenization strategy to enhance the crystallization and passivate harmful defects of the CIGS films. The formation of Ag-Se phase during the selenization process enables the formation of large grains and suppresses the deep level defects. It is found that Ag doping can enlarge the depletion region width, lower the Urbach energy and prolong the carrier lifetime. As a result, a champion solution-processed CIGS solar cell presents a high efficiency of 16.48% with the highly improved opencircuit voltage（VOC） of 662 m V and fill factor（FF） of 75.8%. This work provides an efficient strategy to prepare high quality solution-processed CIGS films for high-performance CIGS solar cells.

关键词： CIGS solar cells Solution-processed method Ag doping crystal growth Defects engineering

Flexible molecules dedicate to release strain of inverted inorganic perovskite solar cell

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Journal of Energy Chemistry 2025年第1期100卷 87-93页

作者： Hongrui Sun Sanlong Wang Pengyang Wang Yali Liu Shanshan Qi Biao Shi Ying Zhao Xiaodan Zhang Institute of Photoelectronic Thin Film Devices and Technology Renewable Energy Conversion and Storage Center State Key Laboratory of Photovoltaic Materials and CellsNankai University key laboratory of Photoelectronic Thin Film Devices and Technology of Tianjin Haihe laboratory of Sustainable Chemical Transformations Engineering Research Center of Thin Film Photoelectronic Technology of Ministry of Education Collaborative Innovation Center of Chemical Science and Engineering (Tianjin)

The tensile strain in inorganic perovskite films induced by thermal annealing is one of the primary factors contributing to the inefficiency and instability of inorganic perovskite solar cells （IPSCs）,which reduces the defect formation ***,a flexible molecule 5-maleimidovaleric acid （5-MVA） was introduced as a strain buffer to release the residual strain of *** anhydride and carboxyl groups in 5-MVA interact strongly with the uncoordinated Pb2+through Lewis acid-base reaction,thus tightly“pull”the perovskite *** in-between soft carbon chain increased the structural flexibility of CsPbI2.85Br0.15perovskite materials,which effectively relieved the intrinsic internal strain of CsPbI2.85Br0.15,resisted the corrosion of external strain,and also reduced the formation of defects such as VIand *** addition,the introduction of 5-MVA improved crystal quality,passivated residual defects,and narrowed energy level ***,power conversion efficiency （PCE） of NiOxbased inverted IPSCs increased from 19.25% to 20.82% with the open-circuit voltage enhanced from 1.164 V to 1.230 *** release of strain also improved the stability of CsPbI2.85Br0.15perovskite films and devices.

关键词： Inverted inorganic perovskite solar cells Flexible molecules Strain release crystallization Energy barrier High PCE

Low-cost and fluoride-free synthesis of MFI zeolite nanosheets with enhanced stability for benzene alkylation with ethanol

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Journal of Energy Chemistry 2025年第1期100卷 458-468页

作者： Peng Zhu Cun Liu Yiren Yu Guoshu Gao Yumeng Zhao Xiongfu Zhang Guodong Liu Guohui Yang State key laboratory of Fine Chemicals School of Chemical Engineering Dalian University of Technology State key laboratory of Catalysis Dalian Institute of Chemical Physics Chinese Academy of Sciences

Zeolite nanosheets with a short b-axis thickness are highly desirable in lots of catalytic reactions due to their reduced diffusion resistance. Nevertheless, conventional synthesis methods usually require expensive structure-directing agents(SDAs), pricey raw materials, and eco-unfriendly fluorine-containing additives. Here, we contributed a cost-effective and fluoride-free synthesis method for synthesizing high-quality MFI zeolite nanosheets through a Silicalite-1(Sil-1) seed suspension and urea cooperative strategy, only with inexpensive colloidal silica as the Si source. Our approach was effective for synthesizing both Sil-1 and aluminum-containing ZSM-5 nanosheets. By optimizing key synthesis parameters,including seed aging time, seed quantity, and urea concentration, we achieved precise control over the crystal face aspect ratio and b-axis thickness. We also revealed a non-classical oriented nanosheet growth mechanism, where Sil-1 seeds induced the formation of quasi-ordered precursor particles, and the(010)crystal planes of these particles facilitated urea adsorption, thereby promoting c-axis-oriented *** obtained ZSM-5 nanosheets exhibited exceptional catalytic performance in the benzene alkylation with ethanol, maintaining stability for over 500 h, which is 5 times longer than traditional ZSM-5 catalysts. Furthermore, large-scale production of ZSM-5 nanosheets was successfully carried out in a 3 L highpressure autoclave, yielding samples consistent with those from laboratory-scale synthesis. This work marks a significant step forward in the sustainable and efficient production of MFI nanosheets using inexpensive and environmentally friendly raw materials, offering the broad applicability in catalysis.

关键词： MFI zeolite ZSM-5 Nanosheets Scale-up synthesis Aromatic alkylation

Growth, structure and upconversion mechanisms of Ba_2ErCl_7 crystal

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Chinese Science Bulletin 2000年第11期45卷 981-984页

作者： HAN Jianru, ZHOU Guangyong, ZHANG Shujun, CHENG Zhenxiang & CHEN HuanchuState key laboratory of crystal materials, Institute of crystal materials of Shandong University, Jinan 250100, China stale key laboratory of crystal materials Institute of Crystal Materials of Shandong University Jinan China

The methods to grow a novel upconversion crystal Ba2ErCI7 are reported in this note. Ba2ErCI7 material was synthesized with Er2O3, BaCI2-2H2O and NH4CI by using a so-called "direct synthesis method". High quality Ba2ErCI7 single crystals with size up to 4 mm×8 mm×15 mm were grown by using the Czochralski and the Bridgman methods. Intense yellow-green luminescence was detected when the crystal was pumped by an 803 laser diode (LD). Transmittance spectrum was measured by using HITACH U-3500 spectrophotometer at room temperature for the first time, in which one can see that the transmittance is high in the range from 350 to 1 600 nm and the cut-off wavelength of the crystal was 230 nm. The upconversion mechanisms were discussed.

关键词： Ba2ErCl2 single crystal growth transmittance spectra upconversion mechanisms.

Researches on the Growth Habit and Optical Properties of Fe^(3+) Ion Doped KDP crystal

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Chinese Journal of Structural Chemistry 2007年第10期26卷 1211-1217页

作者：王波房昌水王圣来孙洵顾庆天许心光李毅平 State key laboratory of crystal materials Institute of Crystal MaterialsShandong University

During the process of KDP crystal growth, metal ions strongly affect the growth habit and optical properties of KDP single crystal. In this paper, KDP crystals were grown from an aqueous solution doped with different concentration of Fe^3＋ dopant by traditional temperaturereduction method and ＂point-seed＂ rapid growth method. Furthermore, we examined the light scatter and measured the transmission of these KDP crystals. It is found that the dopant of Fe^3＋ ion can improve the stability of the KDP growth solution when its concentration is less than 30 ppm. The effects of Fe^3＋ ion on the growth habit and optical properties of KDP crystal are also obvious.

关键词： Fe^3+ ion 10P single crystal optical property light scatter

Growth, Thermal and Optical Properties of Dy_xY_((1-x)Al_3(BO_3)_4 crystal

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Journal of Rare Earths 2004年第1期22卷 104-107页

作者：李静王继扬程绣凤张怀金 State key laboratory of crystal materials

Single crystal of dysprosium-doped yttrium aluminum tetraborate Dy:YAl 3(BO 3) 4(Dy:YAB) was grown by the flux method. The room-temperature absorption spectrum and low-temperature fluorescence spectrum of Dy 3+:YAl 3(BO 3) 4 crystal were measured. The yellow emission transitions ( 4F 9/2→ 6H 13/2)at 575 nm is more intense than other transitions. The specific heat and thermal expansion were measured. The specific heat is 0.93 J·g -1·℃ -1 at room temperature. The maximum of the thermal expansion occurs in the direction parallel to the c-axis and the minimum occurs in the direction parallel to the a-axis. The thermal expansion coefficient along c-axis is almost 6.5 times larger than that along a-axis.

关键词： inorganic materials borates optic properties thermal expansion rare earths

WSe_2 as a saturable absorber for multi-gigahertz Q-switched mode-locked waveguide lasers [Invited]

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Chinese Optics Letters 2019年第2期17卷 65-69页

作者： Ziqi Li Rang Li Chi Pang Yuxia Zhang Haohai Yu Feng Chen School of Physics State key laboratory of crystal materials Shandong University State key laboratory of crystal materials and Institute of crystal materialsShandong University

Graphene and other extraordinary two-dimensional materials together with recent advances in optical modulators have set the foundations for the widespread applications of next-generation optoelectronic devices. In this work, we report on the high-performance fundamentally mode-locked waveguide laser modulated by chemicalvapor-deposition-grown WSe2 as a saturable absorber. By incorporating a WSe2 sample into a monolithic Nd:YVO4 waveguide platform, 6.526 GHz picosecond pulsed laser generation has been achieved at the wavelength of 1 μm with pulse duration of 47 ps.

关键词： WSe2 saturable absorber

Investigation on Raman spectra and thermal properties of LuVO_4 and Nd:LuVO_4 crystals

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Journal of Rare Earths 2011年第3期29卷 207-212页

作者：徐民于浩海张怀金许心光王继扬 State key laboratory of crystal materials Shandong University

Lattice vibration modes of LuVO4 and Nd：LuVO4 crystals were calculated by using space group theory,and polarized Raman spectra were recorded with four different geometrical scattering configurations at room temperature to test the theoretical prediction and assign the normal vibrations of these *** measured specific heats at 293.15 K were 0.368,0.378 and 0.363 J/（g·K） for LuVO4,2 at.% and 3 at.% Nd：LuVO4,*** thermal diffusivities of Nd：LuVO4 crystals were obtained in the temperature range of 303.15-563.15 *** calculated thermal conductivity was 5.149（4.579） W/（m·K） along the [001]（[100]） direction for 2 at.% Nd：LuVO4 at 303.15 K,and 5.059（4.225） W/（m·K） for 3 at.% Nd：LuVO4.

关键词： lattice vibration Raman spectrum thermal analysis rare earths

Growth Defects in Cubic KTa_(1-x)Nb_xO_3 crystal

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Chinese Journal of Structural Chemistry 2008年第3期27卷 261-266页

作者：王旭平王继扬吴剑于永贵张怀金 State key laboratory of crystal materials Shandong University

Potassium tantalate niobate （KTa1-xNbxO3, KTN） crystals with different dimensions and quality situations were grown by Czochralski method. crystal growth process and morphology properties of KTN are presented in this paper. It was found that some defects, such as bubble, inclusion, crack, dislocation etc., can all appear if the crystal is grown in an improper condition. The character and formation mechanism of such defects in macro growth are discussed. We consider that the CO2, which was not released absolutely during the sintering process and dissolved in the melt, led to bubbles. The composition of the inclusion caused by high pulling and rotation rates is KTN polycrystalline. The crack and dislocation in KTN crystal mainly come from improper temperature field. Etching and high-resolution X-ray diffraction （HRXRD） experiment results indicate that the central area is the defects concentrated.

关键词： potassium tantalate niobate (KTa1-xNbxO3 KTN) crystal growth czochralskimethod HRXRD growth defect etching

Angular engineering strategy of an additional periodic phase for widely tunable phase-matched deep-ultraviolet second harmonic generation

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Light(Science & Applications) 2022年第2期11卷 254-261页

作者： Mingchuan Shao Fei Liang Haohai Yu Huaijin Zhang State key laboratory of crystal materials and Institute of crystal materials Shandong UniversityJinan 250100China

Manipulation of the light phase lies at the heart of the investigation of light-matter interactions,especially for efficient nonlinear optical ***,we originally propose the angular engineering strategy of the additional periodic phase(APP)for realization of tunable phase matching and experimentally demonstrate the widely tunable phasematched second harmonic generation(SHG)which is expected for dozens of *** an APP quartz crystal,the phase difference between the fundamental and frequency-doubled light is continuously angularly compensated under this strategy,which results the unprecedented and efficient frequency doubling at wavelengths almost covering the deep-UV spectral range from 221 to 332 ***’s more,all the possible phase-matching types are originally realized simultaneously under the angular engineering phase-matching *** work should not only provide a novel and practical nonlinear photonic device for tunable deep-UV radiation but also be helpful for further study of the light-matter interaction process.

关键词： tunable phase matched