Emerging Trends in Electron Transport Layer Development for Stable and Efficient Perovskite Solar Cells
This study provides guidelines for the use of efficient ETMs in PSCs, describes the remarkable progress of ETMs in various perovskite systems, and focuses on the key ETL challenges: regulating grain structure, defect passivation techniques, energy level alignment, and interface engineering. It finishes with a detailed assessment of the most advanced ETMs, focusing on their strategic importance and future challenges. AbstractPerovskite solar cells (PSCs) stand at the forefront of photovoltaic research, with current efficiencies surpassing 26.1%. This review critically examines the role of electron transport materials (ETMs)...
Source: Small - April 4, 2024 Category: Nanotechnology Authors: Lele Zang,
Chunhu Zhao,
Xiaobo Hu,
Jiahua Tao,
Shaoqiang Chen,
Junhao Chu Tags: Review Source Type: research
A Highly Robust and Conducting Ultramicroporous 3D Fe(II) ‐Based Metal–Organic Framework for Efficient Energy Storage
A 3D redox-active, robust, electrically conductive, ultramicroporous triazolate Fe-MOF is employed as the exclusive electrode material for excellent gravimetric (304 F g−1) and areal (181 mF cm−2) capacitance coupled with high power and energy density even in durable solid-state asymmetric supercapacitor (ASC) devices with remarkable cycling stability, suppressing most of the reported MOF-based electrochemical capacitors, representing encouraging energy storage materials. AbstractExploitation of metal –organic framework (MOF) materials as active electrodes for energy storage or conversion is reasonably challeng...
Source: Small - April 4, 2024 Category: Nanotechnology Authors: Soumen Khan,
Santanu Chand,
Pandiyan Sivasakthi,
Pralok K. Samanta,
Chanchal Chakraborty Tags: Research Article Source Type: research
Anti ‐Solvent‐Free Fabrication of Stable FA0.9Cs0.1PbI3 Perovskite Solar Cells with Efficiency Exceeding 24.0% through a Naphthalene‐Based Passivator
In this study, 2-(naphthalen-2-yl)ethylamine hydriodide (NEAI) is employed as the surface passivator for perovskite films without using any anti-solvent. Naphthalene demonstrates strong π-π conjugation, which aids in the efficient extraction of charge carriers. Additionally, the naphthalene-ring moieties form a tight attachment to the perovskite surface. After NEAI treatment, FA and I vacancies are selectively occupied by NEA+ and I− in NEAI respectively, thus effectively passivating the surface defects and isolating the surface from moisture. Ultimately, the optimized NEAI-treated device achieves a promising power con...
Source: Small - April 4, 2024 Category: Nanotechnology Authors: Hao Kong,
Chenxu Zhao,
Huifang Han,
Huijing Liu,
Pengchen Zou,
Yao Fu,
Kun Lang,
Fan Shen,
Xuewei Liu,
Jia Xu,
Jianxi Yao Tags: Research Article Source Type: research
Activating TiO2 through the Phase Transition ‐Mediated Hydrogen Spillover to Outperform Pt for Electrocatalytic pH‐Universal Hydrogen Evolution
Inert TiO2 for electrocatalytic HER can be activated by synergistically modulating d-band center and triggering hydrogen spillover through the dual doping-induced partial phase transition, exhibiting a superior performance compared to state-of-the-art Pt/C. AbstractEndowing conventional materials with specific functions that are hardly available is invariably of significant importance but greatly challenging. TiO2 is proven to be highly active for the photocatalytic hydrogen evolution while intrinsically inert for electrocatalytic hydrogen evolution reaction (HER) due to its poor electrical conductivity and unfavorable hyd...
Source: Small - April 4, 2024 Category: Nanotechnology Authors: Jiexian Liu,
Peifang Guo,
Da Liu,
Xiaoxiao Yan,
Xin Tu,
Hongge Pan,
Renbing Wu Tags: Research Article Source Type: research
Facile Magnetite Coating for Stable High ‐Voltage Cycling of Nickel‐Rich Cathodes in Conventional Liquid and All‐Solid‐State Lithium‐Ion Batteries
In this study, a protective coating using dispersed “magnetite (FeO.Fe2O3) ” nanoparticles is used to uniformly decorate the surface of LiNi0.8Co0.1Mn0.1O2 (NMC 811) microparticles. The modified cathode delivers significant improvement in electrochemical performance at high voltage ( ≈4.6 V) by suppressing deleterious electrode–electrolyte interactions. A notably higher cycle stability, rate performance, and overall energy density is realized for the coated cathode in a conventional liquid electrolyte battery. When deployed in pellet-stacked solid-state cells with Li6PS5Cl as the electrolyte, the magnetite-coated ...
Source: Small - April 4, 2024 Category: Nanotechnology Authors: Varad Mahajani,
Kevin Bhimani,
Aniruddha Singh Lakhnot,
Reena Panchal,
Apurva Anjan,
Rohit M. Manoj,
Nikhil Koratkar Tags: Research Article Source Type: research
Robust, Self ‐Healing, and Multi‐Use Poly(Urethane‐Urea‐Imide) Elastomer as a Durable Adhesive for Thermal Interface Materials
This study is expected to break the current research paradigm of TIMs and offers new insights for the development of advanced, reliable, and sustainable TIMs. (Source: Small)
Source: Small - April 4, 2024 Category: Nanotechnology Authors: Zhiqiang Wu,
Jie Dong,
Han Guo,
Rui Shang,
Xiuzhi Qin,
Yanfei Xia,
Xiuting Li,
Xin Zhao,
Chengchang Ji,
Qinghua Zhang Tags: Research Article Source Type: research
Hybrid and Asymmetric Supercapacitors: Achieving Balanced Stored Charge across Electrode Materials
Addressing the intricate challenge of charge balancing in hybrid and asymmetric supercapacitors, this work proposes a robust methodology. By outlining specific conditions dependent on loaded mass and charge –discharge current or sweep rate, it offers comprehensive insights. Explore these strategies in detail within the extensive table of contents, providing a nuanced understanding of effective charge balancing across positive and negative electrodes. AbstractAn electrochemical capacitor configuration extends its operational potential window by leveraging diverse charge storage mechanisms on the positive and negative elec...
Source: Small - April 4, 2024 Category: Nanotechnology Authors: Mohammad Qorbani,
Kuei ‐Hsien Chen,
Li‐Chyong Chen Tags: Review Source Type: research
Enabling High Reversibility of Zn anode via Interfacial Engineering Induced by Amino acid Electrolyte Additive
This study advances interfacial engineering through versatile electrolyte additive(s) toward development of stable Zn anode, which may lead to its practical implementation in aqueous rechargeable zinc batteries. (Source: Small)
Source: Small - April 3, 2024 Category: Nanotechnology Authors: Ahmad Naveed,
Teng Li,
Amjad Ali,
Farooq Ahmad,
Waqar Ahmad Qureshi,
Mingru Su,
Xiaowei Li,
Yu Zhou,
Jian ‐Chun Wu,
Yunjian Liu Tags: Research Article Source Type: research
Pushing the Limits of Heat Conduction in Covalent Organic Frameworks Through High ‐Throughput Screening of Their Thermal Conductivity
High-throughput screening of 10,750 covalent organic frameworks for thermal conductivity demonstrates that the strategic modulation of their chemical and structural features can lead to large tunability in their thermal conductivity, which can range from ultralow ( ≈0.02 W m−1 K−1) to exceptionally high ( ≈50 W m−1 K−1) values. AbstractTailor-made materials featuring large tunability in their thermal transport properties are highly sought-after for diverse applications. However, achieving `user-defined ’ thermal transport in a single class of material system with tunability across a wide range of thermal cond...
Source: Small - April 3, 2024 Category: Nanotechnology Authors: Sandip Thakur,
Ashutosh Giri Tags: Research Article Source Type: research
In Situ Photogenerated Radicals of Hydroxyl Substituted Pyrene ‐Based Triphenylamines with Enhanced Transport and Free Doping/Post‐Oxidation for Efficient Perovskite Solar Cells
The pyrene-based HTMs exhibit excellent performance in PSCs with a short-circuit current density (JSC) of 24.71 mA cm−2, open-circuit voltage (Voc) of 1.18 V, and a fill factor (FF) of 80.41%, with the highest PCE of 23.5%, an average PCE of 23.44%, which is the highest PCE reported to-date for PSCs with a pyrene-core based HTM. AbstractThe high-performance hole transporting material (HTM) is one of the most important components for the perovskite solar cells (PSCs) in promoting power conversion efficiency (PCE). However, the low conductivity of HTMs and their additional requirements for doping and post-oxidation great...
Source: Small - April 3, 2024 Category: Nanotechnology Authors: Xiaohui Wang,
Zhixin Xie,
Rongxin Wang,
Ye Xiao,
Kai Yan,
Yu Zhao,
Rui Lin,
Carl Redshaw,
Yonggang Min,
Xinhua Ouyang,
Xing Feng Tags: Research Article Source Type: research
Tuning A ‐Site Cation Deficiency in Pr0.5La0.5BaCo2O5+δ Perovskite to Realize Large‐Scale Hydrogen Evolution at 2000 mA cm−2
A-site cation-deficient strategy is proposed to promote the HER performance of the perovskite catalysts. The lower overpotential (η2000≈ 636 mV), smaller Tafel slope (34.1 mV dec−1), and greater operating stability can be achieved for the first time in as-developed P0.4LBC, compared with commercial Pt/C benchmark. AbstractIndustrial-level hydrogen production from the water electrolysis requires reducing the overpotential (η) as much as possible at high current density, which is closely related to intrinsic activity of the electrocatalysts. Herein, A-site cation deficiency engineering is proposed to screen high-per...
Source: Small - April 3, 2024 Category: Nanotechnology Authors: Kaiqian Li,
Tian Xia,
Ruiping Deng,
Yingnan Dou,
Jingping Wang,
Qiang Li,
Liping Sun,
Lihua Huo,
Hui Zhao Tags: Research Article Source Type: research
Mesoporous Nitrogen ‐Doped Holey Reduced Graphene Oxide: Preparation, Purification, and Application for Metal‐Free Electrochemical Sensing of Dopamine
This study provides the first report on the synthesis and purification of nitrogen-doped holey reduced graphene oxide (N-MHG) that exhibits a mesoporous morphology on the graphene basal plane. The N-MHG features a highly mesoporous network with C ═O and O–C═O fragments, which could account for the remarkable stability of the N-MHG aqueous suspension. AbstractHoley graphenic nanomaterials with porosity within the basal plane attract significant interest. It is observed that the perforation of graphene can enhance the specific surface area of the nanosheet, ensuring effective wetting and penetration of electrolytes to ...
Source: Small - April 3, 2024 Category: Nanotechnology Authors: Albina Mikhraliieva,
Adriano R. S. Lima,
Cristiane L. Jost,
Michael Nazarkovsky,
Yutao Xing,
Volodymyr Zaitsev Tags: Research Article Source Type: research
Skin ‐Inspired Textile Electronics Enable Ultrasensitive Pressure Sensing
A skin-inspired, flexible, breathable, and highly-sensitive textile-based pressure sensor is fabricated via a facile screen-printing and bionic microengineering strategy. This bionic textile-based sensor demonstrates excellent pressure sensing performance benefiting from the bionic intermittent structure. The sensor can also detect a wide range of human motion, and recognize pressure distribution via the electronic skin fabricated by sensor arrays. AbstractWearable pressure sensors have attracted great interest due to their potential applications in healthcare monitoring and human-machine interaction. However, it is still ...
Source: Small - April 3, 2024 Category: Nanotechnology Authors: Xianhong Zheng,
Dashuang Zhou,
Zhi Liu,
Xinghua Hong,
Changlong Li,
Shanhai Ge,
Wentao Cao Tags: Research Article Source Type: research
Tunable Structured 2D Nanobiocatalysts: Synthesis, Catalytic Properties and New Horizons in Biomedical Applications
The recent advancements in creating tunable structured 2D nanobiocatalysts are comprehensively summarized in this review, including the synthetic pathways, structure-property relationships, engineering pathways of transitional metal-based catalytic centers, and new horizons in biomedical applications. Overall, this review will provide cutting-edge and multidisciplinary guidance for accelerating future developments and biomedical applications of 2D nanobiocatalysts. Abstract2D materials have offered essential contributions to boosting biocatalytic efficiency in diverse biomedical applications due to the intrinsic enzyme-mim...
Source: Small - April 3, 2024 Category: Nanotechnology Authors: Qiqi Cui,
Yang Gao,
Qinlong Wen,
Ting Wang,
Xiancheng Ren,
Liang Cheng,
Mingru Bai,
Chong Cheng Tags: Review Source Type: research
Functionalizing Yeast Lipid Droplets as Versatile Biomaterials
This study diversified the functions of lipid droplets from Baker's yeast (Saccharomyces cerevisiae) for innovative in vivo and in vitro applications via protein engineering. By fusing diverse proteins with plant protein oleosin and anchoring these into lipid droplets, they gained new functions as biosensors, for transport of cargo to the plasma membrane, and as biocatalysts. This research highlights their potent ial as advanced biomaterials, opening new avenues beyond conventional lipid storage. AbstractLipid droplets (LD) are dynamic cellular organelles of ≈1 µm diameter in yeast where a neutral lipid core is surr...
Source: Small - April 3, 2024 Category: Nanotechnology Authors: Ankita Suri,
Kevin K.Y. Hu,
Tayyaba Younas,
Geoff Dumsday,
Victoria S. Haritos Tags: Research Article Source Type: research
