Review
Chemistry, Multidisciplinary
Yutian Lei, Youkui Xu, Meng Wang, Ge Zhu, Zhiwen Jin
Summary: Defects are considered to be one of the most significant factors affecting the power conversion efficiency and long-term stability of perovskite solar cells. Various methods to reduce defect density and improve device performance and long-term stability are introduced, including additive engineering, surface passivation, and other physical treatments. Further understanding of defects and the development trends of passivation strategies are also discussed.
Article
Nanoscience & Nanotechnology
Jinghua Xu, Hongwei Qiao, Zhongliang Chen, Xue-Lu Wang, Ye-Feng Yao
Summary: A simple one-step method was used to prepare n-i-p-structured perovskite solar cells with a 3D/2D perovskite heterojunction as the absorption layer. By post-treating the surface of MAPbI(3) films with an organic ligand, the density of surface trap states was reduced, nonradiative recombination was suppressed, and the interface bands were aligned, resulting in a high power conversion efficiency of 21.93%.
Review
Chemistry, Physical
Zhi-Wen Gao, Yong Wang, Wallace C. H. Choy
Summary: This article examines the latest progress in modifying the buried interface of organic-inorganic hybrid perovskite solar cells (PSCs) to enhance their performance and stability. It discusses the use of various materials and techniques and provides valuable insights for achieving higher power conversion efficiency in PSCs and interface adjustment in other layered structure heterojunction devices.
ADVANCED ENERGY MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Bo Li, Zhen Li, Danpeng Gao, Xin Wu, Xintong Li, Chunlei Zhang, Shuai Li, Jianqiu Gong, Dong Zhang, Xiangfan Xie, Shuang Xiao, Haipeng Lu, Mingjie Li, Zonglong Zhu
Summary: By designing long-chain alkylamines as crystallization buffer molecules, the residual strain in tin perovskite films was released, thus improving the photovoltaic performance and stability of lead-stabilized tin perovskite solar cells (TPSCs).
MATERIALS CHEMISTRY FRONTIERS
(2023)
Article
Engineering, Environmental
Jeongbeom Cha, Mi Kyong Kim, Wonjong Lee, Haedam Jin, Hyemi Na, Dinh Cung Tien Nguyen, Soo-Hyoung Lee, Jongchul Lim, Min Kim
Summary: The presence of ionic defects on the surface and at the grain boundaries of perovskite films is a challenge for enhancing the power conversion efficiency of perovskite solar cells. In this study, inorganic perovskite nanomaterials in the form of nanowires were introduced to passivate defects and improve charge transport, resulting in significantly reduced non-radiative recombination and improved device stability. The NW-modified perovskite film achieved a high power conversion efficiency of 21.56% over a 3500-hour period.
CHEMICAL ENGINEERING JOURNAL
(2023)
Article
Chemistry, Physical
Qiang Fu, Hang Liu, Xingchen Tang, Rui Wang, Mingqian Chen, Yongsheng Liu
Summary: The passivation of surface defects of perovskites using organic functional materials has been demonstrated to enhance the efficiency and stability of solar cells. Two solution-processable 2D conjugated polymers, 2DP-F and 2DP-O, were synthesized and found to successfully passivate defects and improve charge carrier extraction in perovskite solar cells.
ACS ENERGY LETTERS
(2022)
Article
Nanoscience & Nanotechnology
Xiang Li, Wangping Sheng, Xiaopeng Duan, Zhuojia Lin, Jia Yang, Licheng Tan, Yiwang Chen
Summary: This study investigates the effect of three polymer additives on perovskite solar cell performance and finds that poly(acrylic acid) (PAA) can effectively passivate defects and achieve the highest conversion efficiency. Moreover, the cross-linking effect of PAA can relieve mechanical stress and improve light soaking stability.
ACS APPLIED MATERIALS & INTERFACES
(2022)
Article
Energy & Fuels
Zuhong Zhang, Hairui Liu, Ying Tang, M. H. Aldamasy, Feng Yang, Jien Yang, Xiaodan Tang, Yanchun Hu, Chaochao Qin, Zhe Li
Summary: A highly efficient and stable triple cation perovskite solar cell with a power conversion efficiency of 22.11% was achieved by introducing aminophylline as an additive. The devices with aminophylline additive demonstrated improved current density, fill factor, open-circuit voltage, and long-term stability compared to control devices.
Article
Chemistry, Physical
Xiaobo Zhang, Wencai Zhou, Xiaoqing Chen, Yichuan Chen, Xuhong Li, Manqi Wang, Ying Zhou, Hui Yan, Zilong Zheng, Yongzhe Zhang
Summary: To improve the performance and stability of perovskite solar cells, a design approach is presented to combine the advantages of high-efficiency 3D perovskite solar cells (PSCs) and long-term stability 2D PSCs. By utilizing a dual passivation approach, a 2D/3D hybrid perovskite film is created, which reduces charge carrier losses and prevents surface decomposition. The study also reveals the passivation mechanisms using molecular dynamics simulations and other techniques. The hybrid perovskites exhibit enhanced efficiency and long-term stability compared to control devices.
ADVANCED ENERGY MATERIALS
(2022)
Article
Chemistry, Multidisciplinary
Beomsoo Kim, Bumjin Gil, Seokjoo Ryu, Jinhyun Kim, Byungwoo Park
Summary: Double-side passivation with PTMAI improves the performance and stability of PSCs by reducing electronic defects and enhancing perovskite crystallinity. This method achieves a high power conversion efficiency of 21.87% and maintains over 80% of initial efficiency after long-term exposure to high temperatures and sunlight.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Dengxue Li, Zhi Xing, Xiangchuan Meng, Xiaotian Hu, Ting Hu, Yiwang Chen
Summary: In this study, a spontaneous internal encapsulation strategy was developed by constructing a dual interfacial perovskite heterojunction at the top and buried interface of the three-dimensional perovskite film. The spacer cations of the two-dimensional perovskite structure interacted strongly with the 3D perovskite to passivate the defects and optimize the energy level alignment. The interfacial perovskite heterojunction underearth delayed the crystallization speed and improved the crystallization quality of the upper 3D perovskite. As a result, the perovskite solar cell exhibited a high power conversion efficiency of 22.92% and maintained 88% of its initial efficiency after 2900 hours under air.
Article
Multidisciplinary Sciences
Zhen Li, Bo Li, Xin Wu, Stephanie A. Sheppard, Shoufeng Zhang, Danpeng Gao, Nicholas J. Long, Zonglong Zhu
Summary: Functionalizing the interfaces of multication and halide perovskite solar cells with an organometallic compound, ferrocenyl-bis-thiophene-2-carboxylate (FcTc(2)), enhances their efficiency and stability. The resulting devices exhibit high performance and stability, as demonstrated by tests and continuous operation.
Review
Chemistry, Multidisciplinary
Wenhuai Feng, Ying Tan, Meifang Yang, Yong Jiang, Bing-Xin Lei, Lianzhou Wang, Wu-Qiang Wu
Summary: Amines, featuring the combination of amino groups and other organic moieties, have shown great potential as additives or surface ligands for improving the performances of perovskite solar cells and perovskite-based light emitting diodes. By rational tailoring of their molecular structures, amine molecules exhibit multifunctionalities and salient advantages. This review unlocks the secrets of how a small amount of amine molecules incorporated in perovskite films can bring big benefits to these optoelectronic devices and discusses feasible rules for the design of amines with ideal molecular structures.
Article
Energy & Fuels
Qian Cheng, Haoran Xia, Xing Li, Boxin Wang, Yanxun Li, Xuning Zhang, Hong Zhang, Yuan Zhang, Huiqiong Zhou
Summary: The interface modification based on organic spacer cations has been shown to enhance the performance of 3D perovskite solar cells by promoting charge transport and extraction while suppressing charge trapping and recombination. By utilizing the optimal spacer cation phenylpropylammonium iodide (PPAI), the 3D/2D perovskite devices achieved a high power conversion efficiency of 22.57% with improved stability under external stresses.
Review
Chemistry, Applied
Carlos Pereyra, Haibing Xie, Monica Lira-Cantu
Summary: Halide perovskite solar cells have shown high power conversion efficiencies, but long-term stability remains a major challenge for commercialization. Additive engineering can enhance device lifetime and efficiency by improving crystal growth and defect passivation. The interaction of additives with the perovskite absorber and transport layers plays a crucial role in improving device performance and stability.
JOURNAL OF ENERGY CHEMISTRY
(2021)
Article
Electrochemistry
Tong Yang, Wenna Zhang, Jiashun Wu, Chi Zhang, Yi Song, Yan Zhao
Summary: Researchers designed a triple-shelled hollow electrocatalyst (CuS@Ni(OH)2@CuS) to enhance both electrocatalytic activity and the robustness for glucose detection. The inner CuS layer composed of nanoparticles and the external CuS layer with nanoflake-like shape provided support and intensified charge transfer/glucose adsorption, respectively. The sensor exhibited high sensitivity, wide linear range, low detection limit, and short response time, indicating its potential for long-term glucose monitoring.
ELECTROCHIMICA ACTA
(2023)
Article
Computer Science, Artificial Intelligence
Lu Jiang, Kunpeng Liu, Yibin Wang, Dongjie Wang, Pengyang Wang, Yanjie Fu, Minghao Yin
Summary: In this article, the authors study the recommendation of knowledge concepts in MOOCs in an explainable manner. They address the challenges of designing an appropriate data structure to capture complex relationships, modeling student interactions with knowledge concepts, and providing explainable recommendation results. They propose a reinforcement learning method integrated with a MOOC knowledge graph and demonstrate its effectiveness through extensive experiments on a real-world MOOC dataset.
ACM TRANSACTIONS ON INTELLIGENT SYSTEMS AND TECHNOLOGY
(2023)
Review
Chemistry, Multidisciplinary
You Gao, Hasan Raza, Zhengping Zhang, Wei Chen, Zonghao Liu
Summary: It is believed that excessive lead iodide (PbI2) has a negative impact on the performance and stability of perovskite solar cells. Moderate PbI2 can improve efficiency by reducing defects, while highly active PbI2 can cause significant hysteresis effects and device instability. Despite efforts to understand the role of excess PbI2, its importance is still underestimated. Recent advances have revealed the potential of modifying excess PbI2, but a comprehensive study is needed for a deeper understanding of its mechanism. This review discusses important breakthroughs and rethinks the efficiency and stability mechanisms of excess PbI2, as well as summarizes the origins, verification, and regulation of residual PbI2.
ADVANCED FUNCTIONAL MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Guangbo Chen, Ruihu Lu, Chenzhao Li, Jianmin Yu, Xiaodong Li, Lingmei Ni, Qi Zhang, Guangqi Zhu, Shengwen Liu, Jiaxu Zhang, Ulrike. I. I. Kramm, Yan Zhao, Gang Wu, Jian Xie, Xinliang Feng
Summary: A Fe-N-C electrocatalyst with dense FeN4 sites on hierarchically porous carbons with highly curved surfaces (FeN4-hcC) is reported, which displays exceptional ORR activity in acidic media. When integrated into a membrane electrode assembly, the corresponding cathode shows a high maximum peak power density and operating durability over 30,000 cycles, outperforming previously reported Fe-N-C electrocatalysts. This work provides new insight into the carbon nanostructure-activity correlation for ORR catalysis and offers a new approach to designing advanced single-metal-site catalysts for energy-conversion applications.
ADVANCED MATERIALS
(2023)
Article
Chemistry, Multidisciplinary
Qi Kang, Zechao Zhuang, Yijie Liu, Zhenhui Liu, Yong Li, Bin Sun, Fei Pei, Han Zhu, Hongfei Li, Pengli Li, Ying Lin, Kunming Shi, Yingke Zhu, Jie Chen, Chaoqun Shi, Yan Zhao, Pingkai Jiang, Yongyao Xia, Dingsheng Wang, Xingyi Huang
Summary: A fiber patterning strategy was proposed to develop and engineer ultrathin fibrous gel polymer electrolytes with high ionic conductivity and superior mechanical toughness for durable and safe solid-state lithium metal batteries. The special patterned structure provides fast Li+ transport channels and tailors the solvation structure of the electrolyte, enabling rapid ionic transfer kinetics and uniform Li+ flux, enhancing stability against Li anodes.
ADVANCED MATERIALS
(2023)
Article
Optics
Yiduo Xu, Fei Peng, Yi Song, Yan Zhao
Summary: Semiconductor processing is becoming more challenging with shrinking integrated circuit dimensions, but the source and mask optimization (SMO) method shows promising performance in ensuring pattern fidelity. Previous methods neglected the impact of normalized image log slope (NILS) in SMO, treating it as a measurement index for forward lithography. In this study, NILS is introduced in inverse lithography and controlled using a penalty function to continuously increase it, thereby enhancing exposure latitude and process window.
Article
Optics
Zhidan Lei, Dekun Yang, Yiduo Xu, A. Hubao, Yi Song, Cheng Lei, Yan Zhao
Summary: With the development of optical storage technology, the research on multi-dimensional high-density storage is increasing. Two-dimensional storage has advantages over three-dimensional storage in terms of manufacturing costs, processing errors, and readout processes. The study demonstrates the potential of nanostructures for achieving ultra-high density optical storage.
OPTICS COMMUNICATIONS
(2023)
Article
Chemistry, Multidisciplinary
Yayun Zheng, Shasha Wei, Jitao Shang, Du Wang, Cheng Lei, Yan Zhao
Summary: To enhance the kinetics of Na+ reactions in sodium-ion batteries, this study successfully developed a structurally stable electrode material, ternary Sn-based dichalcogenide (SnS1.5Se0.5), which addresses several issues that hinder battery performance and longevity. The incorporation of Se improves electrical conductivity and stability, the ternary composition restricts the formation of intermediates, and SnS1.5Se0.5 lowers the diffusion barrier of Na, facilitating rapid ion transport. Additionally, nitrogen and sulfur dual-doped carbon (NS-C) enhances surface chemistry and conductivity, leading to a promising pseudocapacitive storage effect.
Article
Chemistry, Multidisciplinary
Ruwei Chen, Chengyi Zhang, Jianwei Li, Zijuan Du, Fei Guo, Wei Zhang, Yuhang Dai, Wei Zong, Xuan Gao, Jiexin Zhu, Yan Zhao, Xiaohui Wang, Guanjie He
Summary: This study proposes a hydrated deep eutectic electrolyte with reduced free water content, which can suppress water-induced side reactions and provide high Zn2+ mass transfer kinetics. This results in highly reversible Zn anodes and high capacity Zn//NVO full cells.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
You Gao, Fumeng Ren, Derun Sun, Sibo Li, Guanhaojie Zheng, Jianan Wang, Hasan Raza, Rui Chen, Haixin Wang, Sanwan Liu, Peng Yu, Xin Meng, Jizhou He, Jing Zhou, Xiaodong Hu, Zhengping Zhang, Longbin Qiu, Wei Chen, Zonghao Liu
Summary: In perovskite solar cells, the presence of residual lead iodide (PbI2) near the buried interface reduces stability. By using a mixed A-cation halide strategy, the unstable PbI2 near the buried interface is transformed into a more stable 3D perovskite, improving stability. This strategy also balances lattice strain, suppresses phase transition, and improves phase stability, resulting in high power conversion efficiencies of 24.26% and 20.97% for solar cells and modules, respectively. Furthermore, the solar cells maintain 94.7% of their initial efficiencies after 1000 hours of operation under one sun illumination.
ENERGY & ENVIRONMENTAL SCIENCE
(2023)
Article
Chemistry, Multidisciplinary
Jiao Shen, Tao Zhang, Hong Jiang, Kai Wang, Haiqing Chang, Tian C. Zhang, Yan Zhao, Yubo Fan, Ying Liang, Xiaobao Tian
Summary: The use of Janus ZnXY2 structures as two-dimensional materials can address the limitations faced by conventional photocatalysts for hydrogen production via photocatalytic water splitting. The enhanced built-in electric fields in these structures enable high photon utilization, rapid carrier transfer, and low-barrier redox reactions. The ductile nature of ZnSnSe2 and ZnSnTe2 monolayers further improves their hydrogen evolution reaction efficiency and resistance to photocorrosion. The optimal stacking configuration and tensile strain can enhance visible light utilization and intermediate absorption.
Article
Chemistry, Multidisciplinary
Qi Kang, Zechao Zhuang, Yijie Liu, Zhenhui Liu, Yong Li, Bin Sun, Fei Pei, Han Zhu, Hongfei Li, Pengli Li, Ying Lin, Kunming Shi, Yingke Zhu, Jie Chen, Chaoqun Shi, Yan Zhao, Pingkai Jiang, Yongyao Xia, Dingsheng Wang, Xingyi Huang
Summary: This study proposes a design method for fiber patterned gel polymer electrolytes with high ionic conductivity and superior mechanical toughness for durable and safe solid-state lithium metal batteries. The special patterned structure provides fast lithium ion transport channels and tailors the solvation structure, enabling uniform lithium ion flux, enhancing stability against lithium anodes, and achieving ultralong lithium plating/stripping.
ADVANCED MATERIALS
(2023)
Article
Energy & Fuels
Chi Zhang, Siwei Zhu, Du Wang, Cheng Lei, Yan Zhao
Summary: In this study, the non-uniform lithium deposition in porous lithium metal anodes was simulated using an electrochemical phase field model. Four factors were investigated to enhance homogeneous lithium deposition and increase the capacity for inside-pore lithium deposition. It was found that increasing the diffusion coefficient of lithium ion and designing a structured lithium metal anode with gradient reaction constants and porosity can improve inside-pore lithium deposition.
JOURNAL OF ENERGY STORAGE
(2023)
Article
Chemistry, Physical
Xiaodong Hu, Yongyan Pan, Jianan Wang, Zonghao Liu, Wei Chen
Summary: The degradation mechanism of Sn-Pb mixed perovskite films under different light/O2 and only O2 conditions and its relationship with energy disorder were investigated. A strategy of using NH4SCN as an additive for energy disorder regulation was proposed and proved effective in improving carrier transport efficiency and reducing energy disorder, resulting in enhanced performance of Sn-Pb perovskite solar cells.
Review
Materials Science, Multidisciplinary
Wenguang Liu, Hasan Raza, Xiaodong Hu, Sanwan Liu, Zonghao Liu, Wei Chen
Summary: In this review, important research progress on the 'golden triangle' parameters of efficiency, stability, and cost in perovskite solar cells (PSCs) was objectively analyzed. Key bottlenecks and contradictions hindering their fast commercialization were identified, and urgent directions requiring intensive research and development input were proposed to speed up the commercialization process of PSCs.
