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Two-dimensional layered material/silicon heterojunctions for energy and optoelectronic applications

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Nano Research 2016年第1期9卷 72-93页

作者： Yuming Wang Ke Ding Baoquan Sun shuit-tong lee Jiansheng Jie Institute of Functional Nano & Soft Materials (FUNSOM) Collaborative Innovation Center of Suzhou Nano Science and Technology(NANO-CIC) Jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices Soochow University Suzhou 215123 China

As one of the most important semiconductor materials, silicon （Si） has been widely used in current energy and optoelectronic devices, such as solar cells and photodetectors. However, the traditional Si p-n junction solar cells need complicated fabrication processes, leading to the high cost of Si photovoltaic devices. The wide applications of Si-based photodetectors are also hampered by their low sensitivity to ultraviolet and infrared light. Recently, two-dimensional （2D） layered materials have emerged as a new material system with tremendous potential for future energy and optoelectronic applications. The combination of Si with 2D layered materials represents an innovative approach to construct high-performance optoelectronic devices by harnessing the complementary advantages of both materials. In this review, we summarize the recent advances in 2D layered material/Si heterojunctions and their applications in photovoltaic and optoelectronic devices. Finally, the outlook and challenges of 2D layered material/Si heterojunctions for high-performance device applications are presented.

关键词： two-dimensional layeredmaterials silicon heterojunctions solar cells photodetectors

Black phosphorus induced photo-doping for high-performance organic-silicon heterojunction photovoltaics

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Nano Research 2017年第11期10卷 3848-3856页

作者： Zhouhui Xia Pengfei Li Yuqiang Liu Tao Song Qiaoliang Bao shuit-tong lee Baoquan Sun Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices Institute of Functional Nano and Soft Materials(FUNSOM)Soochow University Suzhou 215123 China Department of Materials Science and Engineering Monash University Clayton Victoria 3800 Australia

In conventional crystalline silicon （Si） homojunction solar cells,a strategy of doping by transporting phosphorus or boron impurities into Si is commonly used to build Ohmic contacts at rear ***,this technique involves an energy intensive,high temperature （～ 800 ℃） process and toxic doping *** phosphorus （BP） is a two-dimensional,narrow bandgap semiconductor with high carrier mobility that exhibits broad light harvesting ***,we place BP：zinc oxide （ZnO） composite films between Si and aluminum （Al） to improve their *** the BP harvests photons with energies below 1.1 eV from the crystalline Si,the ZnO carrier concentration increases dramatically due to charge *** photo-induced doping results in a high carrier concentration in the ZnO film,mimicking the modulated doping technique used in semiconductor *** show that photo-induced carriers dramatically increase the conductivities of the BP-modified ZnO films,thus reducing the contact resistance between Si and Al.A photovoltaic power conversion efficiency of 15.2% is achieved in organic-Si heterojunction solar cells that use a ZnO：BP *** findings demonstrate an effective way of improving Si/metal contact via a simple,low temperature process.

关键词： black phosphorus zinc oxide light induced dopant photovoltaics

Perspective on the perovskite quantum dots for flexible photovoltaics

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Journal of Energy Chemistry 2021年第11期30卷 505-507,I0011页

作者： Jiabei Yuan Nopporn Rujisamphan Wanli Ma Jianyu Yuan Youyong Li shuit-tong lee Institute of Functional Nano&Soft Materials(FUNSOM) Jiangsu Key Laboratory of Carbon-Based Functional Materials and DevicesSoochow UniversitySuzhou 215123JiangsuChina Macao Institute of Materials Science and Engineering Macao University of Science and TechnologyTaipa 999078MacaoChina Nanoscience and Nanotechnology Graduate Program Faculty of ScienceKing Mongkut’s University of Technology ThonburiBangkok 10140Thailand

Owing to the ever-increasing charging demand for portable electronics,display devices and wearable electronic textiles,flexible and lightweight solar cells are highly urgent to be ***-generation solution-processable photovoltaic(PV)devices attracted great attentions due to their unique properties of low-cost,lightweight,and large-area printing compatibility with flexible substrates[1].

关键词： printing perovskite compatibility

Enhanced RuBisCO activity and promoted dicotyledons growth with degradable carbon dots

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Nano Research 2019年第7期12卷 1585-1593页

作者： Hao Li Jian Huang Yang Liu Fang Lu Jun Zhong Yong Wang Shuiming Li Yeshayahu Lifshitz shuit-tong lee Zhenhui Kang Institute of Functional Nano & Soft Materials (FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials & DevicesJoint International Research Laboratory of Carbon-Based Functional Materials and DevicesSoochow UniversitySuzhou 215123China School of biology & basic medical sciences Soochow universitySuzhou 215123China College of Life Science and Oceanography Shenzhen Key Laboratory of Marine Bioresources and EcologyShenzhen UniversityShenzhen 518060China School of Basic Medical Sciences Beijing University of Chinese MedicineBeijing 100029China Department of Materials Science and Engineering TechnionIsrael Institute of TechnologyHaifa 3200003Israel

The ~ 5 nm degradable carbon dots (CDs) were synthesized directly from carbon rod by a one-step electrochemical method at room *** as-prepared CDs can effectively enhance the ribulose bisphosphate carboxylase oxygenase (RuBisCO) activity,and then promote the dicotyledons growth (soybean,tomato,eggplant and so on) and finally increase their ***,we used Arabidopsis thaliana and Trifolium repens *** model plants to systematically study the beneficial effects of CDs on plant *** include:(i) accelerating seed germination;(ii) enlarging root elongation;(iii) increasing metal ions absorption and delivery;(iv) improving enzymes activity;(v) enhancing the carbohydrate content;(vi) degradation into plant hormone analogues and CO2;and finally (vii) enhancing the grain production by about 20%.

关键词： carbon dots bio-degradation photosynthesis plant life cycle improve growth

Surface-enhanced fluorescence from copper nanoparticles on silicon nanowires

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Frontiers of Optoelectronics 2011年第1期4卷 114-120页

作者： Shujuan ZHUO Mingwang SHAO Liang CHENG Ronghui QUE Dorthy Duo Duo MA shuit tong lee Institute of Functional Nano & Soft Materials (FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials & DevicesSoochow University Center of Super-Diamond and Advanced Films and Department of Physics and Materials Science City University of Hong Kong

A method to enhance surface plasmon coupled fluorescence from copper nanoparticles on silicon nanowires is presented. Owing to resonant plasmons oscillation on the surface of Cu/Si nanostructure, the fluorescence peaks of several lanthanide ions(praseodymium ions, Pr3+,neodymium ions Nd3+, holmium ions Ho3+, and erbium ions Er3+) were markedly enhanced with the enhancement of maximal 2 orders of magnitude, which was larger than that caused by unsupported Cu nanoparticles. These results might be explained by the local field overlap originated from the closed and fixed copper nanoparticles on silicon nanowires.

关键词： Cu/Si nanostructure surface-enhanced fluorescence lanthanide ions resonant plasmons oscillation

Silicon Nanostructures for Energy and Catalysis Applications

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Silicon Nanostructures for Energy and Catalysis Applications

Carrier-Free,Water-Dispersible Hydrophobic Drug Nanoparticles for Targeted Drug Delivery

中国化学会第十七次全国电化学大会

作者： shuit-tong lee Institute of Functional Nano ＆ Soft Materials（FUNSOM） College of Nano Science and Technology（CNST） Soochow University

＜正＞Si nanostructures in various forms can be rationally synthesized using vapor-liquid-solid（metal-or oxide-assisted）growth or electrochemical etching *** nanostructures（nanowires,quantum dots）exhibit unique and interesting structural,optical,electronic and chemical properties,which are exploited for myriad exciting *** devices

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Carrier-Free,Water-Dispersible Hydrophobic Drug Nanoparticle...

High-performance planar heterojunction perovskite solar cells： Preserving long charge carrier diffusion lengths and interracial engineering

中国化学会第28届学术年会

作者： shuit-tong lee Center of Super-Diamond and Advanced Film（COSDAF）＆Department of Physics and Materials Science City University of Hong Kong

Anticancer drugs embedded in or conjugated with nanocarriers have shown obvious therapeutic advantages over carrier-free drugs,yet they still face the problems like low drug loading capacity,possible systemic ***,we demonstrate a new concept which involves first preparation of pure drug into nanoparticles and then the functionalization of NPs with amphipathic surfactant through to achieve good *** a proof of concept,10-HydroxyCamptothecin（HCPT）was chosen as a model anticancer drug to demonstrate the effectiveness of this *** modified NPs exhibit excellent dispersity and stability in physiological saline and high drug loading content and great in vitro anti-cancer ***,HCPT NPs are readily conjugated with targeting agents to afford a targeted drug delivery system,which exhibits significantly enhanced drug efficacy and specific receptor-positive tumor cells with high *** strategy can be generally extended to other hydrophobic drugs to achieve biocompatible nanoparticles for efficient drug delivery.

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Nano Research 2014年第12期7卷 1749-1758页

作者： Sai Bai Zhongwei Wu Xiaojing Wu Yizheng Jin Ni Zhao Zhihui Chen Qingqing Mei Xin Wang Zhizhen Ye Tao Song Ruiyuan Liu shuit-tong lee Baoquan Sun State Key Laboratory of Silicon Materials Cyrus Tang Center for Sensor Materials and Applications Department of Materials Science and Engineering and Center for Chemistry of High-Performance and Novel Materials Zhejiang University Hangzhou 310027 China jiangsu Key Laboratory for Carbon-Based Functional Materials & Devices Institute of Functional Nano & Soft Materials (FUNSOM) and Collaborative Innovation Center of Suzhou Nano Science and Technology Soochow University 199 Ren'ai Road Suzhou 215123 China Department of Electronic Engineering the Chinese University ofHong Kong Shatin New Territories Hong Kong China Shenzhen Resenrch Institute the Chinese University ofHong Kong Shatin New Territories Hong Kong China

We demonstrate that charge carrier diffusion lengths of two classes of perovskites, CH3NH3PbI3-xClx and CH3NH3PbI3, are both highly sensitive to film processing conditions and optimal processing procedures are critical to preserving the long carrier diffusion lengths of the perovskite films. This understanding, together with the improved cathode interface using bilayer-structured electron transporting interlayers of [6,6]-phenyl-C61-butyric acid methyl ester （PCBM）/ZnO, leads to the successful fabrication of highly efficient, stable and reproducible planar heterojunction CH3NH3PbI3-xCl2 solar cells with impressive power-conversion efficiencies （PCEs） up to 15.9%. A 1-square-centimeter device yielding a PCE of 12.3% has been realized, demonstrating that this simple planar structure is promising for large-area devices.

关键词： perovskite solar cells planar heterojunction charge carrier diffusion lengths ZnO nanocrystal films large area devices

Red organic light-emitting diodes based photobiomodulation therapy enabling prominent hair growth

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Nano Research 2023年第5期16卷 7164-7170页

作者： Shuang-Qiao Sun Jing-Jing Shen Yu-Fei Wang Yu-tong Jiang Lin-Fu Chen Hua Xin Jiang-Nan Wang Xiao-Bo Shi Xiao-Zhao Zhu Qi Sun Liang-Sheng Liao Qian Chen Man-Keung Fung shuit-tong lee Institute of Functional Nano&Soft Materials(FUNSOM) Jiangsu Key Laboratory for Carbon-Based Functional Materials&DevicesSoochow University199 Ren'ai RoadSuzhou 215123China Macao Institute of Materials Science and Engineering(MIMSE) MUST-SUDA Joint Research Center for Advanced Functional MaterialsZhuhai MUST Science and Technology Research InstituteMacao University of Science and TechnologyTaipa 999078MacaoChina 3 Institute of Organic Optoelectronics Jiangsu Industrial Technology Research Institute(JITRI)1198 Fenhu DadaoWujiangSuzhou 215200China

Hair loss can cause psychological ***,red organic light-emitting diode(OLED)light source is first introduced as the photobiomodulation therapy(PBMT)for hair growth and demonstrated as a promising and non-invasive therapeutic modality for *** exhibits unique advantages of homogeneous irradiation,flexible in form factor,less heat *** features enable OLED to be an ideal candidate for wearable PBMT light sources.A systematic study of using red OLEDs to facilitate hair growth was *** results show that OLEDs excellently promote hair *** irradiation can increase the length of the hair by a factor of 1.5 as compared to the control,the hair regrowth area is enlarged by over 3 times after 20 days of ***,the mechanism of OLED that stimulates hair follicle regeneration is investigated invivo by conducting a systematic controlled experiments on mice with or without OLED *** on the comprehensive histological and immunofluorescence staining studies,two key factors are identified for red OLEDs to facilitate hair follicle regeneration:(i)increased autophagy during the anagen phase of the hair growth cycle;(ii)increased blood oxygen content promoted by the accelerated microvascular blood flow.

关键词： red organic light-emitting diode(OLED) light therapy hair growth autophagy oxygen saturation