Article
Materials Science, Ceramics
Yin Wu, Dai-Bing Zhang, Zhao Zhao, Jun Pei, Bo-Ping Zhang
Summary: C-doping in ZnO was achieved through a facile and speedy SPS technique, improving electrical conductivity and power factor by reducing band gap and increasing carrier concentration. Meanwhile, introduced point defects strengthened phonon scattering and decreased thermal conductivity, leading to a peak ZT value of 0.024 at 773 K for Zn(O,C) bulk. This demonstrates that C-doping in ZnO is an effective and convenient strategy to enhance thermoelectric performance.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Chemistry, Physical
Zhao Zhao, Dou-Dou Liang, Jun Pei, Jian-Lei Shi, Yin Wu, Rui Zhang, Bo-Ping Zhang
Summary: Introducing Mn into Cu1.8S is an effective strategy to enhance thermoelectric properties, reduce thermal conductivity, and improve thermoelectric efficiency.
JOURNAL OF MATERIOMICS
(2021)
Article
Chemistry, Multidisciplinary
Jiajun Wang, Guangjin Wang, Jinfeng Zhang, Yidu Wang, Han Wu, Xuerong Zheng, Jia Ding, Xiaopeng Han, Yida Deng, Wenbin Hu
Summary: This study demonstrates that tuning the electronic states of ZnO by replacing the Zn site with heteroatoms can significantly modulate the activities of CO2RR and HER inversely, leading to a dramatic tuning of the practical CO2RR performance. The correlation between electronic states, reaction free energies, and practical activity is also highlighted, providing insights for engineering efficient CO2RR electrocatalysts through tunable composition and electronic structures.
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2021)
Article
Physics, Multidisciplinary
Akhtar Hussain, Qurat Ul Ain Asif, Azeem Ghulam Nabi, Hamayl Asim, Hafiz Muhammad Rafique
Summary: Doping of X-atoms in monolayer MoS2 can effectively modulate the structural and electronic properties, resulting in smaller band gaps and different conduction types depending on the dopant site and substituted atom. This study provides valuable information on the nature of doping and its potential applications in semiconducting electronic devices. The findings can also be applied to tune the electronic and optical characteristics of other 2D transition metal dichalcogenides (TMDs) for more efficient electronic devices.
Article
Chemistry, Physical
U. Sandhya Shenoy, D. Krishna Bhat
Summary: This study focuses on improving the performance of thermoelectric material Pb0.6Sn0.4Te by doping Zn to enhance power factor, reduce thermal conductivity, and improve Seebeck coefficient. The introduction of multiple electronic valleys and band gap opening through Zn doping show promising results for future energy applications, with an experimental figure of merit ZT of 1.57 at 840K.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Crystallography
Buda Li, Menglu Li, Hangbo Qi, Xiaotao Zu, Liang Qiao, Haiyan Xiao
Summary: In this study, the effects of chlorine doping on the structural, electronic, and thermoelectric properties of Bi2O2Se were investigated. It was found that chlorine doping significantly influences the electronic structure and thermoelectric properties of Bi2O2Se, leading to metallic behavior and enhanced electrical conductivity and power factor.
Article
Chemistry, Physical
Yuxin Sun, Fengkai Guo, Haixu Qin, Wei Cai, Jiehe Sui
Summary: Mn doping has a significant impact on the thermoelectric properties of AgSbSe2, increasing carrier concentration and reducing lattice thermal conductivity, resulting in a high ZT value and improved efficiency.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Woojin Choi, Soohyun Kim, Soonyong Lee, Changhwa Jung, Ayushi Tripathi, Yoonjoo Lee, Han Young Woo, Hyunjung Lee
Summary: The thermoelectric performance of a semicrystalline polymer was experimentally studied in a limited range of doping levels using molecular doping methods. The doping level was finely controlled through in situ electrochemical doping, and the charge generation/transport and thermoelectric properties were analyzed. It was found that the polymers exhibited p- to n-type transition in heavily doped states, and the TE behaviors were interpreted based on the relation between the localized DOS band structure and molecular packing structure during electrochemical doping.
Article
Chemistry, Physical
Woojin Choi, Soohyun Kim, Soonyong Lee, Changhwa Jung, Ayushi Tripathi, Yoonjoo Lee, Han Young Woo, Hyunjung Lee
Summary: In this study, the thermoelectric performance of a specific semicrystalline polymer was experimentally investigated. The researchers used in situ electrochemical doping to finely control the doping level and analyzed the charge generation/transport and thermoelectric properties of the polymer. They also compared the changes in crystalline morphologies and local density of states during electrochemical doping. The study found that the choice of side chains had a significant impact on the charge transport and electrical conductivity of the polymer.
Article
Chemistry, Physical
Daishi Shiojiri, Tsutomu Iida, Hiroki Kakio, Masato Yamaguchi, Naomi Hirayama, Yoji Imai
Summary: Thermoelectric power generation using Mg2Si, doped with Sb and C, can enhance thermoelectric performance and effectively utilize waste heat energy.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Lin Bo, Fujin Li, Yangbo Hou, Lei Wang, Xinglong Wang, Ruipeng Zhang, Min Zuo, Yanzhen Ma, Degang Zhao
Summary: This study investigates the influence of co-alloying solid solution on the microstructure and thermoelectric properties of Cu3SbSe4. It is found that co-alloying solid solution can enhance the electrical conductivity and reduce the thermal conductivity, resulting in improved thermoelectric performance.
JOURNAL OF MATERIALS SCIENCE
(2022)
Article
Chemistry, Physical
Nan Xin, Yifei Li, Guihua Tang, Longyun Shen
Summary: In this study, KxSn1-xSe was synthesized by doping K2CO3 and processed through hydrogen reduction, with the effects of K doping on the electronic transport performance of SnSe studied via DFT calculation and experimental measurement. K doping narrows the band gap, increases hole concentration, and enhances electrical conductivity, with thermal excitation affecting sigma in high temperature regions. High levels of K doping limit ZT max, but result in higher overall ZT values.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Chemistry, Physical
Duarte Moco, Jose F. Malta, Luis F. Santos, Elsa B. Lopes, Antonio P. Goncalves
Summary: In the search for new thermoelectric materials, tetrahedrite mineral has shown potential due to its abundance, low toxicity, and good thermoelectric performance. However, improvement in its performance is needed to make it a suitable alternative. This project explores the effects of simultaneous doping with nickel and selenium in tetrahedrite's thermoelectric properties, achieving high power factor and zT values. Further improvements may be possible by addressing detrimental factors such as grain boundaries and disorder.
Article
Chemistry, Physical
Huaxing Zhu, Guiwen Wang, Guoyu Wang, Xiaoyuan Zhou, Xu Lu
Summary: Cu doping is found to be more favorable for the transport properties of InTe compared with Na doping and In-deficiency, as Cu can effectively weaken the Coulomb scattering for charge carriers. In the case of Cu-doped In0.99Cu0.01Te compound, a higher zT value is achieved, attributed to the enhanced carrier concentration and well-maintained mobility, showing more than 35% enhancement compared to Na-doped and self-doped compounds.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Chemistry, Physical
Wanlu Hu, Meng Tian, Kai Zeng, Jin Yan, Junhua Zhou, Jinlei Zhang, Mark H. Rummeli, Haibo Wang, Ruizhi Yang
Summary: It has been discovered that dual doping of nickel and iron can activate W18O49 and turn it into a highly active electrocatalyst for the oxygen evolution reaction. Compared to monodoping, dual doping of nickel and iron can synergistically modulate the electronic structure and physicochemical properties of tungsten oxides.
ACS APPLIED ENERGY MATERIALS
(2022)
Article
Materials Science, Multidisciplinary
Hsin-jay Wu, Albert T. Wu, Pai-chun Wei, Sinn-wen Chen
MATERIALS RESEARCH LETTERS
(2018)
Article
Multidisciplinary Sciences
Bin Cheng, Ting-You Li, Pai-Chun Wei, Jun Yin, Kang-Ting Ho, Jose Ramon Duran Retamal, Omar F. Mohammed, Jr-Hau He
NATURE COMMUNICATIONS
(2018)
Review
Chemistry, Multidisciplinary
Huile Jin, Jun Li, James Iocozzia, Xin Zeng, Pai-Chun Wei, Chao Yang, Nan Li, Zhaoping Liu, Jr Hau He, Tiejun Zhu, Jichang Wang, Zhiqun Lin, Shun Wang
ANGEWANDTE CHEMIE-INTERNATIONAL EDITION
(2019)
Article
Multidisciplinary Sciences
Pai-Chun Wei, Cheng-Xun Cai, Cheng-Rong Hsing, Ching-Ming Wei, Shih-Hsun Yu, Hsin-Jay Wu, Cheng-Lung Chen, Da-Hua Wei, Duc-Long Nguyen, Mitch M. C. Chou, Yang-Yuan Chen
SCIENTIFIC REPORTS
(2019)
Review
Chemistry, Multidisciplinary
Pai-Chun Wei, Chien-Neng Liao, Hsin-Jay Wu, Dongwang Yang, Jian He, Gill V. Biesold-McGee, Shuang Liang, Wan-Ting Yen, Xinfeng Tang, Jien-Wei Yeh, Zhiqun Lin, Jr-Hau He
ADVANCED MATERIALS
(2020)
Article
Chemistry, Physical
Chun-Ho Lin, Ting-You Li, Jing Zhang, Zong-Yi Chiao, Pai-Chun Wei, Hui-Chun Fu, Long Hu, Meng-Ju Yu, Ghada H. Ahmed, Xinwei Guan, Chih-Hsiang Ho, Tom Wu, Boon S. Ooi, Omar F. Mohammed, Yu-Jung Lu, Xiaosheng Fang, Jr-Hau He
Article
Chemistry, Multidisciplinary
Yi-Fen Tsai, Pai-Chun Wei, Liuwen Chang, Kuang-Kuo Wang, Chun-Chuen Yang, Yen-Chung Lai, Cheng-Rong Hsing, Ching-Ming Wei, Jian He, G. Jeffrey Snyder, Hsin-Jay Wu
Summary: The phase transition induced by Sb doping in GeTe can generate favorable spontaneous composition fluctuations and enhance the zT value of thermoelectric materials. This method can suppress thermal conductivity, maintain an appropriate carrier concentration range, and create high-performance thermoelectric materials.
ADVANCED MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Tobias Biesner, Weiwu Li, Alexander A. Tsirlin, Seulki Roh, Pai-Chun Wei, Ece Uykur, Martin Dressel
Summary: Pressure-sensitive spectroscopy measurements have revealed promising ways to tune semiconducting materials for energy harvesting and advanced electronic applications. Researchers have characterized SnSe crystals under high pressures to map out the appearance and influence of multivalleys on properties like phase transitions and energy conversion.
NPG ASIA MATERIALS
(2021)
Article
Materials Science, Multidisciplinary
Wen-Hsien Li, Chi-Hung Lee, Tsu-Yin Ling, Ma-Hsuan Ma, Pai-Chun Wei, Jr-Hau He, Chun-Min Wu, Jen-Chih Peng, Guangyong Xu, Yang Zhao, Jeffrey W. Lynn
Summary: Neutron diffraction and inelastic neutron scattering were used to study the coupling between organic CH3NH3+ cations and inorganic perovskite PbBr3- framework in a large single crystal of (CH3NH3)PbBr3. Two lattice incommensurate (ICM) phases were found, with temperature-induced changes causing significant lattice expansions and contractions. Complete atomic ordering into a (CH3NH3)PbBr3 lattice was observed at 200 K, accompanied by changes in phonon branches.
PHYSICAL REVIEW MATERIALS
(2021)
Article
Chemistry, Multidisciplinary
Dedi, Ping-Chung Lee, Pai-Chun Wei, Yang-Yuan Chen
Summary: This study reports on the thermoelectric properties of topological insulator bismuth selenide nanowires, achieved using a specially designed platform for simultaneous measurements on a single wire. Experimental results on the properties of conductivity, Seebeck coefficient, and thermal conductivity were found to be in good agreement with theoretical studies.
Article
Materials Science, Multidisciplinary
Ashoka Karunarathne, Prakash Parajuli, Gautam Priyadarshan, Sriparna Bhattacharya, Rahul Rao, Pai-Chun Wei, Yang-Yuan Chen, Joseph R. Gladden, Apparao M. Rao
Summary: NTE materials exhibit unique thermal expansion properties due to their highly anisotropic microstructures. Experimental and theoretical studies can provide further insights into the mechanical characteristics of NTE materials.
Article
Materials Science, Multidisciplinary
C. -H. Lee, M. -H. Ma, W. -H. Li, P. -C. Wei, Y. -Y. Chen, Y. Zhao, J. W. Lynn
MATERIALS TODAY PHYSICS
(2019)
Article
Chemistry, Physical
Hsin-Jay Wu, Pai-Chun Wei, Hui-Yi Su, Kuang-Kuo Wang, Wan-Ting Yen, I-Lun Jen, Jian He
ACS APPLIED ENERGY MATERIALS
(2019)
Article
Chemistry, Multidisciplinary
Pai-Chun Wei, Sriparna Bhattacharya, Yu-Fei Liu, Fengjiao Liu, Jian He, Yung-Hsiang Tung, Chun-Cheun Yang, Cheng-Rong Hsing, Duc-Long Nguyen, Ching-Ming Wei, Mei-Yin Chou, Yen-Chung Lai, Tsu-Lien Hung, Syu-You Guan, Chia-Seng Chang, Hsin-Jay Wu, Chi-Hung Lee, Wen-Hsien Li, Raphael P. Hermann, Yang-Yuan Chen, Apparao M. Rao
Article
Physics, Multidisciplinary
Bin Cheng, Ting-You Li, Partha Maity, Pai-Chun Wei, Dennis Nordlund, Kang-Ting Ho, Der-Hsien Lien, Chun-Ho Lin, Ru-Ze Liang, Xiaohe Miao, Idris A. Ajia, Jun Yin, Dimosthenis Sokaras, Ali Javey, Iman S. Roqan, Omar F. Mohammed, Jr-Hau He
COMMUNICATIONS PHYSICS
(2018)