Funding and Research Outcome
Funding
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安徽省海外高层次人才引进项目（安徽省“百人计划”），主持；50万；
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安徽省属公办普通本科高校领军骨干人才项目（安徽省“青年皖江学者”），主持；50万；
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安徽大学高层次引进人才项目，2017.06.01-2022.05.30，主持；60 万；
Project supported by the Introduction Project of High-Level Talent in Anhui University
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国家自然科学基金委/面上项目，纳米器件跨尺度多物理场建模及热结构应力调控研究，62171001，2022.01.01-2025.12.31，主持；
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安徽省自然科学基金委/面上项目，基于多场耦合的钙钛矿光伏器件稳定性研究 ，2108085MF198，2021.07-2023.06，主持；12万；
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安徽省科技厅/安徽省科技重大专项（公开竞争类）项目计划，异构芯片叠装组装SiP技术研发及产业化，202203a05020035，2022.05.01-2025.4.30，主持；200万； （公示文件）
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安徽省教育厅/安徽省高校协同创新项目，新型钙钛矿太阳能电池多物理建模及稳定性研究，GXXT-2022-**”，2022.07.01-2024.6.30，主持；100万； （公示文件）
（Project supported by The University Synergy Innovation Program of Anhui Province, GXXT-2022-** ），“安徽高校协同创新项目，项目编号：GXXT-2022-**”； -
国家自然科学基金委/青年项目，基于钙钛矿太阳能电池的光电一体化建模及其应用研究，61701003，2018.01.01-2020.12.31，主持；27.5万；
Project supported by the Young Scientists Fund of the National Natural Science Foundation of China (Grant No. 61701003).
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安徽省自然科学基金委/青年项目，新型钙钛矿太阳能电池极限效率的预测和光电损耗机制的研究，1808085QF179，2018.07-2020.06，主持；10万；
Project supported by the Natural Science Research Foundation of Anhui Province (Grant No. 1808085QF179）
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安徽大学一流学科建设开放基金，基于多物理模型研究微纳结构和离子移动改善钙钛矿太阳能电池性能，2019.01-2021.12，主持；10万；
Open fund for Discipline Construction, Institute of Physical Science and Information Technology, Anhui University；Institute of Physical Science and Information Technology, Anhui University
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广东省纳米微米材料研究重点实验室开放课题，基于光电多物理模型研究高效率和高稳定度钙钛矿太阳能电池设计方案，2017B030314002，2019.03-2020.02，主持；5万；
项目号：The Guangdong Science and Technology Program (2017B030314002)
实验室名称：Guangdong Provincial Key Lab of Nano-Micro Materials Research, School of Chemical Biology and Biotechnology, Peking University Shenzhen Graduate School, Shenzhen 518055, China
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中国科学院苏州纳米技术与纳米仿生研究所纳米器件重点实验室开放课题，高性能钙钛光伏效率损耗及优化的光电一体化多物理设计研究，19LH02，2019.05-2020.05，主持；4万；
Key Laboratory of Nanodevices and Applications, Suzhou Institute of Nano-Tech and Nano-Bionics, Chinese Academy of Sciences
中国科学院苏州纳米技术与纳米仿生研究所； 纳税人识别号：12100000717826387T；
Research
Invited Seminar
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2019年4月10日， 西北工业大学 李炫华 教授，《金属等离激元光学特性及其应用研究》；
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2019年4月10日，中国科学技术大学 肖正国 教授，《Film Morphology and Device Structure Engineering for Perovskite Solar Cells and LEDs》；
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2018年8月2日，香港大学 ，蔡植豪 教授，《New Schemes of Room-Temperature Solution-Processes for High Performance Organic and Perovskite Optoelectronic Devices》；
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2018年8月2日，香港大学 ，张鸿 博士，《Ligand-Engineered Perovskites for Achieving High-Performance and Stable Solar Cellss》；
Exploring the Way to Approach the Efficiency Limit of Perovskite Solar Cells by Drift-Diffusion Model
Drift-diffusion model is an indispensable modeling tool to understand the carrier dynamics (transport, recombination, and collection) and simulate practical-efficiency of solar cells (SCs) through taking into account various carrier recombination losses existing in multilayered device structures. Exploring the way to predict and approach the SC efficiency limit by using the drift-diffusion model will enable us to gain more physical insights and design guidelines for emerging photovoltaics, particularly perovskite solar cells. Our work finds out that two procedures are the prerequisites for predicting and approaching the SC efficiency limit. First, the intrinsic radiative recombination needs to be corrected after adopting optical designs which will significantly affect the open-circuit voltage at its Shockley–Queisser limit. Through considering a detailed balance between emission and absorption of semiconductor materials at the thermal equilibrium and the Boltzmann statistics at the nonequilibrium, we offer a different approach to derive the accurate expression of intrinsic radiative recombination with the optical corrections for semiconductor materials. The new expression captures light trapping of the absorbed photons and angular restriction of the emitted photons simultaneously, which are ignored in the traditional Roosbroeck-Shockley expression. Second, the contact characteristics of the electrodes need to be carefully engineered to eliminate the charge accumulation and surface recombination at the electrodes. The selective contact or blocking layer incorporated nonselective contact that inhibits the surface recombination at the electrode is another important prerequisite. With the two procedures, the accurate prediction of efficiency limit and precise evaluation of efficiency degradation for perovskite solar cells are attainable by the drift-diffusion model. Our work is fundamentally and practically important to mathematical modeling and physical understanding of solar cells.
High Efficiency Organic Solar Cells Achieved by the Simultaneous Plasmon-Optical and Plasmon-Electrical Effects from Plasmonic Asymmetric Modes of Gold Nanostars
The plasmon-optical effects have been utilized to optically enhance active layer absorption in organic solar cells (OSCs). The exploited plasmonic resonances of metal nanomaterials are typically from the fundamental dipole/high-order modes with narrow spectral widths for regional OSC absorption improvement. The conventional broadband absorption enhancement (using plasmonic effects) needs linear-superposition of plasmonic resonances. In this work, through strategic incorporation of gold nanostars (Au NSs) in between hole transport layer (HTL) and active layer, the excited plasmonic asymmetric modes offer a new approach toward broadband enhancement. Remarkably, the improvement is explained by energy transfer of plasmonic asymmetric modes of Au NS. In more detail, after incorporation of Au NSs, the optical power in electron transport layer transfers to active layer for improving OSC absorption, which otherwise will become dissipation or leakage as the role of carrier transport layer is not for photon-absorption induced carrier generation. Moreover, Au NSs simultaneously deliver plasmon-electrical effects which shorten transport path length of the typically low-mobility holes and lengthen that of high-mobility electrons for better balanced carrier collection. Meanwhile, the resistance of HTL is reduced by Au NSs. Consequently, power conversion efficiency of 10.5% has been achieved through cooperatively plasmon-optical and plasmon-electrical effects of Au NSs.
Optically enhanced semi-transparent organic solar cells through hybrid metal/nanoparticle/dielectric nanostructure
Semi-transparent organic solar cells (st-OSCs) that hold high recovery of efficiency with sunlight illumination from both electrodes are of great interest in different applications. While the issues for improving the recovery of efficiency from top-illumination are very limited studied, we propose a hybrid optical nanostructure metal/nanoparticle/dielectric (M/NP/D) to achieve high recovery of efficiency. The M/NP/D nanostructure consists of high index and low-loss nanoparticles (NPs) (here we use Si NPs scatter instead of metal NPs) and index matching material (here we use Tris(8-hydroxyquinolinato) aluminum-Alq3) on ultra-thin Ag film, i.e. Ag/Si NPs/Alq3 as the top hybrid electrode of st-OSCs. Our results show that the transmission of the electrode is improved complementarily in long (due to Si NPs) as well as short wavelength regions (due to Alq3 layer) with additional synergetic improvement (due to hybrid M/NP/D nanostructure). Subsequently, the enhanced average visible transmittance (AVT) up to 32% is achieved for the proposed st-OSCs. Simultaneously, compared to the optimized control st-OSC with the bare ultra-thin Ag electrode, the power conversion efficiency (PCE) for top-illumination case is improved by about 34%, with a recovery of efficiency up to 68%. Moreover, angular dependence of short circuit current (Jsc) of st-OSCs with the hybrid electrode can be also alleviated. Consequently, the proposed transparent hybrid electrode can contribute to the emerging semi-transparent optoelectronics.
