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基于氧化镱缓冲层实现高效反式结构钙钛矿太阳能电池

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科学通报 2024年第13期69卷 1669-1670页

作者：宁志军上海科技大学物质科学与技术学院上海201210

为了实现碳中和,能源结构的转型势在必行.太阳能转化的电能在终端能源消费中的比重逐年增长,离不开太阳能电池技术的不断革新.其中,基于金属卤化物钙钛矿的太阳能电池经过10多年的迅猛发展,其光电转换效率已经可以与传统晶硅太阳能电池... 详细信息

为了实现碳中和,能源结构的转型势在必行.太阳能转化的电能在终端能源消费中的比重逐年增长,离不开太阳能电池技术的不断革新.其中,基于金属卤化物钙钛矿的太阳能电池经过10多年的迅猛发展,其光电转换效率已经可以与传统晶硅太阳能电池相媲美,在未来大规模的产业化进程中也被寄予厚望.钙钛矿太阳能电池(perovskite solar cells,PSCs)按器件结构主要分为两类:一类是正式结构电池.

关键词：钙钛矿太阳能电池光电转换效率晶硅太阳能电池金属卤化物终端能源消费缓冲层能源结构碳中和

Planar core based starburst triphenylamine molecules as hole transporting materials for high-performance perovskite solar cells

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Science China Chemistry 2019年第1期62卷 5-6页

作者： Qi Wei zhijun ning School of Physical Science and Technology Shanghai Tech University

Starburst triphenylamine molecules are generally used as hole transporting materials (HTMs)for optoelectronic devices like solar cells,light emitting diode and field effect transistors .The use of starburst triphenylamine molecules like spiro-OMeTAD HTM initiated the construction of solid state perovskite solar cells (PSCs).Currently,based on triphenylamine HTMs,the highest power conversion efficiency (PCE)of PSCs is up to 22.1%.

关键词： Starburst triphenylamine molecules

Emerging highly emissive and stable white emitting “phosphores” based on lead-free inorganic halide perovskites

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Science China Chemistry 2019年第3期62卷 287-288页

作者： Qi Wei zhijun ning School of Physical Science and Technology ShanghaiTech University

Single materials generating high-efficiency white light emission are of particular interest for lighting. Recently, metal halide perovskite is emerging as a promising candidate for white light emission materials. However, lead halide perovskites showing broad spectrum light emission generally present low luminescence quantum yield and the emission spectrum deviates from the standard white light color coordinate.

关键词： Single materials generating high-efficiency lighting

Molecularly manipulating orientation of hole transporting layers and mitigation of electrical loss for dopant-free CsPbI_(2)Br solar cells

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Science China Chemistry 2021年第10期64卷 1607-1608页

作者： Xianyuan Jiang zhijun ning School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210China

Organo-lead halide perovskites(OHPs) possess superior optoelectronic properties and have achieved an amazing certified power conversion efficiency(PCE) of 25.5% in perovskite solar cells(PSCs)[1]. Recent studies revealed that the organic cations such as methylammonium(MA^(+)) and formamidinium(FA^(+)) and anions with weak electronegativity such as I^(-) in OHPs were causing instability.

关键词： instability perovskite ammonium

Colloidal quantum-dots surface and device structure engineering for high-performance light-emitting diodes

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National Science Review 2017年第2期4卷 170-183页

作者： Yuequn Shang zhijun ning School of Physical Science and Technology Shanghai Tech University Shanghai Institute of Ceramics Chinese Academy of Sciences University of Chinese Academy of Sciences

The application of colloidal quantum dots for light-emitting devices has attracted considerable attention in recent years, due to their unique optical properties such as size-dependent emission wavelength, sharp emission peak and high luminescent quantum yield. Tremendous efforts have been made to explore quantum dots for light-emission applications such as light-emitting diodes(LEDs) and light *** performance of quantum-dots-based light-emitting diodes(QD-LEDs) has been increasing rapidly in recent decades as the development of quantum-dots synthesis, surface-ligand engineering and device-architecture optimization. Recently, the external quantum efficiencies of red quantum-dots LEDs have exceeded 20.5% with good stability and narrow emission peak. In this review, we summarize the recent advances in QD-LEDs, focusing on quantum-dot surface engineering and device-architecture optimization.

关键词： colloidal quantum dots light-emitting diodes surface engineering device architecture

Theoretical Study of Using Kinetics Strategy to Enhance the Stability of Tin Perovskite

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Energy & Environmental Materials 2020年第4期3卷 541-547页

作者： Qi Wei Youqi Ke zhijun ning School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210China

Tin perovskite solar cell received great attention in recent years owing to its optimum bandgap and heavy metal-free *** main concern for the development of tin perovskite is the oxidation from Sn^(2+)to Sn^(4+).Herein,we report a surface hetero-protection strategy to avoid the surface reaction of tin *** types of materials,including low-dimensional tin perovskite,alkali metal halide,and oxides of group IVA element,are exploited as protecting materials on tin perovskite surface with first-principles *** lattice mismatch,oxidation resistance,and interface stability of these materials are investigated to search for ideal protecting-layer *** screening over 30 candidates,we finally obtain 8 suitable materials(SiO_(2),GeO_(2),KCl,Na Br,Cs F,Li F,Li I,CsSn_(2)Br_(5))for hetero-protection of tin *** further understand their application potential in a solar cell device,we then calculate the property of charge transfer between the interface of these materials and tin *** study provides a guide for the experimental realization of efficient and stable tin perovskite solar cell.

关键词： density functional theory interface oxidation stability tin perovskite

Strategies for enhancing the stability of metal halide perovskite towards robust solar cells

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Science China Materials 2022年第12期65卷 3190-3201页

作者： Wei Zhou Ting Pan zhijun ning School of Physical Science and Technology ShanghaiTech UniversityShanghai 201210China

Perovskite is rising as the most promising material for the next generation of solar cells,due to its high efficiency,low cost,and convenient ***,the stability of perovskite solar cells remains to be a challenge towards large-scale *** materials play a key role in improving the stability of PSCs,and tremendous efforts have been committed to stabilizing the perovskite materials,including composition regulation,crystallization control,and interface *** we review the state-of-the-art strategies to improve the stability of perovskite layers in PSCs,and important strategies are *** analyze in-depth the influence of each site ion on perovskite structural stability and summarize the important progress of these structures showing superior *** then summarize the use of additives to regulate perovskite crystallization and defect passivation and elaborate the related ***,the pros and cons of different interface treatment methods used in perovskite solar cells are discussed。

关键词： perovskite solar cells stability

Supersaturation controlled growth of MAFAPbI3 perovskite film for high efficiency solar cells

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Science China Chemistry 2018年第10期61卷 1278-1284页

作者： Dong Liu Wenjia Zhou Haoying Tang Pengfei Fu zhijun ning School of Physical Science and Technology Shanghai Tech University Shanghai 201210 China Shanghai Institute of Ceramics Chinese Academy of Sciences Shanghai 200050 China University of Chinese Academy of Sciences Beijing 100049 China

Controlling the nucleation and growth of organic-inorganic hybrids perovskite is of key importance to improve the morphology and crystallinity of perovskite films. However, the growth mechanism of perovskite films based on classical crystallization theory is not fully understood. Here, we develop a supersaturation controlled strategy(SCS) to balance the nucleation and crystal growth speeds. By this strategy, we are able to find an ideal supersaturation region to realize a balance of nucleation and crystal growth, which yields highly crystallized perovskite films with micrometer-scale grains. Besides, we provide a thoughtful analysis of nucleation and growth based on the fabrication of the perovskite films. As a result, the highest photovoltaic power conversion efficiencies(PCE) of 19.70% and 20.31% are obtained for the planar and the meso-superstructured devices, respectively. This strategy sheds some light for understanding the film growth mechanism of high quality perovskite film, and it provides a facile strategy to fabricate high efficiency perovskite solar cells.

关键词： perovskite solar cell nucleation and growth supersaturation

Perovskite nanocrystals:synthesis,properties and applications

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Science Bulletin 2017年第5期62卷 369-380页

作者： Pengfei Fu Qingsong Shan Yuequn Shang Jizhong Song Haibo Zeng zhijun ning Jinkang Gong Shanghai Institute of Ceramics Chinese Academy of SciencesShanghai 200050China University of Chinese Academy of Sciences Beijing 100049China School of Physical Science and Technology Shanghai Tech UniversityShanghai 201210China Institute of Optoelectronics & Nanomaterials Jiangsu Key Laboratory of Advanced Micro & Nano Materials and TechnologyCollege of Material Science and EngineeringNanjing University of Science and TechnologyNanjing 210094China

Halide perovskites have emerged as superstar materials for optoelectronic devices. Besides the fever of research in solar cells, these materials show great promise on light emitting diodes(LEDs), photodetectors and lasers as well. Rapid advances in bulk perovskite materials aroused universal interest for the development of perovskite nanocrystals, inspired by the great progress of classic colloidal semiconductor quantum dots. Perovskite nanocrystals have been synthesized based on solution process and exhibited high luminescence quantum yield, sharp emission peak, and emission color tunability. Significant progresses have been made about the application of perovskite nanocrystals for LED and lasers in recent years. In this paper, we will comprehensively introduce the synthesis strategies, physical and chemical characteristics, as well as their applications in optoelectronic devices.

关键词： Halide perovskite Nanocrystals Light emitting diode Laser