Search results for: Chengxi Zhang

Items from 1 to 20 out of 41 results

article

Post‐Synthetic Interstitial Metal Doping for Efficient and Stable 3D/2D Heterostructured Perovskite Solar Cells

Chengxi Zhang, Ardeshir Baktash, Julian A. Steele, Dongxu He, more

Advanced Functional Materials > 34 > 24 > n/a - n/a

Perovskite solar cells (PSCs) have experienced exceptional development in recent years, due to their outstanding photoelectronic properties and low‐cost solution processing. Many state‐of‐the‐art PSC designs have been effectively demonstrated using a stacked 3D perovskite/2D perovskite heterostructure, yet limitations arise due to the low conductivity of the 2D perovskite, the hidden buried interface...

article

Dynamic event‐triggered orbit coordination for spacecraft formation via a self‐learning sliding mode control approach

Qingxian Jia, Junnan Gao, Yunhua Wu, He Liao, more

International Journal of Robust and Nonlinear Control > 34 > 9 > 5754 - 5773

This article investigates the issue of orbit coordination control for a class of multi‐spacecraft formation systems in presence of limited communication and external disturbance. To solve the limitation of communication sources, a dynamic event trigger (DET) mechanism is developed to reduce the communication frequency between the follower spacecrafts. Subsequently, we explore a robust DET mechanism‐based...

article

Boosting the Performances of Semitransparent Organic Photovoltaics via Synergetic Near‐Infrared Light Management

Tao Xu, Baozhong Deng, Kaiwen Zheng, Hongyu Li, more

Advanced Materials > 36 > 18 > n/a - n/a

Semitransparent organic photovoltaics (ST‐OPVs) offer promising prospects for application in building‐integrated photovoltaic systems and greenhouses, but further improvement of their performance faces a delicate trade‐off between the two competing indexes of power conversion efficiency (PCE) and average visible transmittance (AVT). Herein, the authors take advantage of coupling plasmonics with the...

article

Vacuum Processed Metal Halide Perovskite Light‐Emitting Diodes

Chun Zhou, Wenyuan Meng, Lingmei Kong, Chengxi Zhang, more

Advanced Functional Materials > 34 > 8 > n/a - n/a

Metal halide perovskite light‐emitting diodes (PeLEDs) are expected to be the next‐generation display technology due to their unique optoelectronic properties. Currently, the external quantum efficiencies of PeLEDs based on solution‐processed fabrication methods already exceed 20%. However, there are still many challenges existing in solution‐based PeLEDs that inhibit their commercialization. Recently,...

article

Accelerated Redox Reactions Enable Stable Tin‐Lead Mixed Perovskite Solar Cells

Dongxu He, Peng Chen, Mengmeng Hao, Miaoqiang Lyu, more

Angewandte Chemie International Edition > 63 > 4 > n/a - n/a

The facile oxidation of Sn²⁺ to Sn⁴⁺ poses an inherent challenge that limits the efficiency and stability of tin‐lead mixed (Sn−Pb) perovskite solar cells (PSCs) and all‐perovskite tandem devices. In this work, we discover the sustainable redox reactions enabling self‐healing Sn−Pb perovskites, where their intractable oxidation degradation can be recovered to their original state under light soaking...

article

Accelerated Redox Reactions Enable Stable Tin‐Lead Mixed Perovskite Solar Cells

Dongxu He, Peng Chen, Mengmeng Hao, Miaoqiang Lyu, more

Angewandte Chemie > 136 > 4 > n/a - n/a

article

Highly Controlled Zigzag Perovskite Nanocrystals Enabled by Dipole‐Induced Self‐Assembly of Nanocubes for Low‐Threshold Amplified Spontaneous Emission and Lasing

Chengxi Zhang, Jiayi Chen, Lyudmila Turyanska, Junhui Wang, more

Advanced Functional Materials > 33 > 3 > n/a - n/a

Self‐assembly of nanocrystals into controlled structures while uncompromising their properties is one of the key steps in optoelectronic device fabrication. Herein, zigzag CsPbBr₃ perovskite nanocrystals are demonstrated with a precise number of components with nanocube morphology, these can be successfully obtained through a dipole‐induced self‐assembly process. The addition of a trace amount of...

article

A Spacer Cation Assisted Nucleation and Growth Strategy Enables Efficient and High‐Luminance Quasi‐2D Perovskite LEDs

Lingmei Kong, Yaning Luo, Lyudmila Turyanska, Ting Zhang, more

Advanced Functional Materials > 33 > 2 > n/a - n/a

Quasi‐2D Ruddlesden‐Popper perovskites receive tremendous attention for application in light‐emitting diodes (LEDs). However, the role of organic ammonium spacers on perovskite film has not been fully‐understood. Herein, a spacer cation assisted perovskite nucleation and growth strategy, where guanidinium (GA⁺) spacer is introduced into the perovskite precursor and at the interface between the hole...

article

Dual Metal‐Assisted Defect Engineering towards High‐Performance Perovskite Solar Cells

Chengxi Zhang, Ardeshir Baktash, Jun‐Xing Zhong, Weijian Chen, more

Advanced Functional Materials > 32 > 52 > n/a - n/a

Perovskite solar cells (PSCs) have witnessed an unprecedentedly rapid development, especially in terms of power conversion efficiency (PCE). However, the solution‐processed perovskite films inevitably possess numerous crystallographic defects (e.g., halide vacancies), which has been shown to incur non‐radiative charge recombination and ion migration, thus limiting the enhancement of the PCE and stability...

article

Stability of Perovskite Light‐Emitting Diodes: Existing Issues and Mitigation Strategies Related to Both Material and Device Aspects

Lingmei Kong, Xiaoyu Zhang, Chengxi Zhang, Lin Wang, more

Advanced Materials > 34 > 43 > n/a - n/a

Metal halide perovskites combine excellent electronic and optical properties, such as defect tolerance and high photoluminescence efficiency, with the benefits of low‐cost, large‐area, solution‐based processing. Composition‐ and dimension‐tunable properties of perovskites have already been utilized in bright and efficient light‐emitting diodes (LEDs). At the same time, there are still great challenges...

article

Stability of Perovskite Light‐Emitting Diodes: Existing Issues and Mitigation Strategies Related to Both Material and Device Aspects (Adv. Mater. 43/2022)

Lingmei Kong, Xiaoyu Zhang, Chengxi Zhang, Lin Wang, more

Advanced Materials > 34 > 43 > n/a - n/a

Perovskite Light‐Emitting Diodes Although the efficiency of perovskite light‐emitting diodes (LEDs) has reached commercial requirements, their operational lifetime is still challenging. In article number 2205217, Xiaoyu Zhang, Andrey L. Rogach, Xuyong Yang, and co‐workers review recent advances in the lifetime of perovskite LEDs, the origins of instability in perovskite LEDs, and strategies to improve...

article

Template‐Guided Regioselective Encaging of Platinum Single Atoms into Y Zeolite: Enhanced Selectivity in Semihydrogenation and Resistance to Poisoning

Qiang Chen, Pai Peng, Ganjun Yang, Yanzhi Li, more

Angewandte Chemie > 134 > 35 > n/a - n/a

It is challenging to establish single metal atoms with a uniform coordination environment at targeted sites of a zeolite. In this study, single platinum atoms were selectively encaged in the six‐membered rings of sodalite (SOD) cages within Y zeolite using a template‐guiding strategy. During the in situ synthesis process, template molecules were designed to occupy supercages and thereby force coordinated...

article

Template‐Guided Regioselective Encaging of Platinum Single Atoms into Y Zeolite: Enhanced Selectivity in Semihydrogenation and Resistance to Poisoning

Qiang Chen, Pai Peng, Ganjun Yang, Yanzhi Li, more

Angewandte Chemie International Edition > 61 > 35 > n/a - n/a

article

Limited‐information learning observer for simultaneous estimation of states and parameters

Dechao Ran, Chengxi Zhang, Bing Xiao

International Journal of Robust and Nonlinear Control > 32 > 5 > 2780 - 2790

The problem of simultaneous estimation of states and uncertainties by using limited information is investigated in this article. A sampled‐data learning observer (SLO) is presented for linear time‐invariant continuous systems, which can achieve successful estimation while only needs intermittent sampled‐data, saves computing resources, and does not require persistent excitation signals. The observer's...

article

Interfacial Linkage and Carbon Encapsulation Enable Full Solution‐Printed Perovskite Photovoltaics with Prolonged Lifespan

Tian Tian, Jun‐Xing Zhong, Meifang Yang, Wenhuai Feng, more

Angewandte Chemie > 133 > 44 > 23928 - 23935

Simplified perovskite solar cells (PSCs) were fabricated with the perovskite layer sandwiched and encapsulated between carbon‐based electron transport layer (ETL) and counter electrode (CE) by a fully blade‐coated process. A self‐assembled monolayer of amphiphilic silane (AS) molecules on transparent conducting oxide (TCO) substrate appeals to the fullerene ETL deposition and preserves its integrity...

article

Interfacial Linkage and Carbon Encapsulation Enable Full Solution‐Printed Perovskite Photovoltaics with Prolonged Lifespan

Tian Tian, Jun‐Xing Zhong, Meifang Yang, Wenhuai Feng, more

Angewandte Chemie International Edition > 60 > 44 > 23735 - 23742

article

Core/Shell Metal Halide Perovskite Nanocrystals for Optoelectronic Applications

Chengxi Zhang, Jiayi Chen, Lingmei Kong, Lin Wang, more

Advanced Functional Materials > 31 > 19 > n/a - n/a

Core/shell structured metal halide perovskite nanocrystals (NCs) are emerging as a type of material with remarkable optical and electronic properties. Research into this field has been developing and expanding rapidly in recent years, with significant advances in the studies of the shell growth mechanism and in understanding of properties of these materials. Significant enhancement of both the stability...

article

Metal Halide Perovskites: Metal Halide Perovskite Nanorods: Shape Matters (Adv. Mater. 46/2020)

Chengxi Zhang, Jiayi Chen, Sheng Wang, Lingmei Kong, more

Advanced Materials > 32 > 46 > n/a - n/a

Metal‐halide‐perovskite nanocrystals display shape‐dependent optoelectronic properties that underpin a wide range of stimulating applications. In article number 2002736, Xuyong Yang, Andrey L. Rogach, Guohua Jia, and co‐workers review the recent advances in metal‐halide‐perovskite nanorods, spanning the crystal structures, growth mechanisms, enhanced properties, and widespread applications in solar...

article

Metal Halide Perovskite Nanorods: Shape Matters

Chengxi Zhang, Jiayi Chen, Sheng Wang, Lingmei Kong, more

Advanced Materials > 32 > 46 > n/a - n/a

Quasi‐1D metal halide perovskite nanorods (NRs) are emerging as a type of materials with remarkable optical and electronic properties. Research into this field is rapidly expanding and growing in the past several years, with significant advances in both mechanistic studies of their growth and widespread possible applications. Here, the recent advances in 1D metal halide perovskite nanocrystals (NCs)...

article

Core/Shell Perovskite Nanocrystals: Synthesis of Highly Efficient and Environmentally Stable FAPbBr₃/CsPbBr₃ for LED Applications

Chengxi Zhang, Sheng Wang, Xiaomin Li, Mingjian Yuan, more

Advanced Functional Materials > 30 > 31 > n/a - n/a

Lead halide perovskite nanocrystals (PeNCs) are promising materials for applications in optoelectronics. However, their environmental instability remains to be addressed to enable their advancement into industry. Here the development of a novel synthesis method is reported for monodispersed PeNCs coated with all inorganic shell of cesium lead bromide (CsPbBr₃) grown epitaxially on the surface of formamidinium...

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INFONA - science communication portal

Search results for: Chengxi Zhang

Post‐Synthetic Interstitial Metal Doping for Efficient and Stable 3D/2D Heterostructured Perovskite Solar Cells

Dynamic event‐triggered orbit coordination for spacecraft formation via a self‐learning sliding mode control approach

Boosting the Performances of Semitransparent Organic Photovoltaics via Synergetic Near‐Infrared Light Management

Vacuum Processed Metal Halide Perovskite Light‐Emitting Diodes

Accelerated Redox Reactions Enable Stable Tin‐Lead Mixed Perovskite Solar Cells

Accelerated Redox Reactions Enable Stable Tin‐Lead Mixed Perovskite Solar Cells

Highly Controlled Zigzag Perovskite Nanocrystals Enabled by Dipole‐Induced Self‐Assembly of Nanocubes for Low‐Threshold Amplified Spontaneous Emission and Lasing

A Spacer Cation Assisted Nucleation and Growth Strategy Enables Efficient and High‐Luminance Quasi‐2D Perovskite LEDs

Dual Metal‐Assisted Defect Engineering towards High‐Performance Perovskite Solar Cells

Stability of Perovskite Light‐Emitting Diodes: Existing Issues and Mitigation Strategies Related to Both Material and Device Aspects

Stability of Perovskite Light‐Emitting Diodes: Existing Issues and Mitigation Strategies Related to Both Material and Device Aspects (Adv. Mater. 43/2022)

Template‐Guided Regioselective Encaging of Platinum Single Atoms into Y Zeolite: Enhanced Selectivity in Semihydrogenation and Resistance to Poisoning

Template‐Guided Regioselective Encaging of Platinum Single Atoms into Y Zeolite: Enhanced Selectivity in Semihydrogenation and Resistance to Poisoning

Limited‐information learning observer for simultaneous estimation of states and parameters

Interfacial Linkage and Carbon Encapsulation Enable Full Solution‐Printed Perovskite Photovoltaics with Prolonged Lifespan

Interfacial Linkage and Carbon Encapsulation Enable Full Solution‐Printed Perovskite Photovoltaics with Prolonged Lifespan

Core/Shell Metal Halide Perovskite Nanocrystals for Optoelectronic Applications

Metal Halide Perovskites: Metal Halide Perovskite Nanorods: Shape Matters (Adv. Mater. 46/2020)

Metal Halide Perovskite Nanorods: Shape Matters

Core/Shell Perovskite Nanocrystals: Synthesis of Highly Efficient and Environmentally Stable FAPbBr₃/CsPbBr₃ for LED Applications

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