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22. Near-Unity Emitting, Widely Tailorable and Stable Exciton Concentrators Built from Doubly Gradient 2D Semiconductor Nanoplatelets

Author

Liang, Xiao, Durmusoglu, Emek G., Lunina, Maria, Hernandez-Martinez, Pedro Ludwig, Valuckas, Vytautas, Yan, Fei, Lekina, Yulia, Sharma, Vijay Kumar, Yin, Tingting, Ha, Son Tung, Shen, Ze Xiang, Sun, Handong, Kuznetsov, Arseniy, and Demir, Hilmi Volkan

Subjects
Physics - Optics
Abstract

The strength of electrostatic interactions (EI) between electrons and holes within semiconductor nanocrystals profoundly impact the performance of their optoelectronic systems, and different optoelectronic devices demand distinct EI strength of the active medium. However, achieving a broad range, fine-tuning of the EI strength for specific optoelectronic applications is a daunting challenge, especially in quasi 2-dimensional core-shell semiconductor nanoplatelets (NPLs), as the epitaxial growth of the inorganic shell along the direction of the thickness that solely contributes to the quantum confined effect significantly undermines the strength of the EI. Herein we propose and demonstrate a novel doubly-gradient (DG) core-shell architecture of semiconductor NPLs for on-demand tailoring of the EI strength by controlling the localized exciton concentration via in-plane architectural modulation, demonstrated by a wide tuning of radiative recombination rate and exciton binding energy. Moreover, these exciton-concentration-engineered DG NPLs also exhibit a near-unity quantum yield, remarkable thermal and photo stability, as well as considerably suppressed self-absorption. As proof-of-concept demonstrations, highly efficient color converters and high-performance light-emitting diodes (external quantum efficiency: 16.9%, maximum luminance: 43,000 cd/m2) have been achieved based on the DG NPLs. This work thus opens up new avenues for developing high-performance colloidal optoelectronic device applications.

Published
2023

47. Face Milling of AISI 52100: Evaluation of Tool Performance and Surface Integrity

Author

Singh, Talvinder, Sharma, Vijay Kumar, Rana, Mohit, Singh, Kamaljeet, Chaari, Fakher, Series Editor, Gherardini, Francesco, Series Editor, Ivanov, Vitalii, Series Editor, Cavas-Martínez, Francisco, Editorial Board Member, di Mare, Francesca, Editorial Board Member, Haddar, Mohamed, Editorial Board Member, Kwon, Young W., Editorial Board Member, Trojanowska, Justyna, Editorial Board Member, Li, Xianguo, editor, Rashidi, Mohammad Mehdi, editor, Lather, Rohit Singh, editor, and Raman, Roshan, editor

Published
2023
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48. Effect of Different MQL Parameters on the Surface Quality of Aluminum Alloy During Face Milling

Author

Singh, Kamaljeet, Sharma, Vijay Kumar, Singh, Talvinder, Rana, Mohit, Goyal, Rakesh, Chaari, Fakher, Series Editor, Gherardini, Francesco, Series Editor, Ivanov, Vitalii, Series Editor, Cavas-Martínez, Francisco, Editorial Board Member, di Mare, Francesca, Editorial Board Member, Haddar, Mohamed, Editorial Board Member, Kwon, Young W., Editorial Board Member, Trojanowska, Justyna, Editorial Board Member, Li, Xianguo, editor, Rashidi, Mohammad Mehdi, editor, Lather, Rohit Singh, editor, and Raman, Roshan, editor

Published
2023
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49. Multi-response Optimization in Face Milling of EN-31 Steel Using Hybrid CRITIC and DFA Technique

Author

Sharma, Vijay Kumar, Singh, Talvinder, Singh, Kamaljeet, Rana, Mohit, Kaur, Gagandeep, Chaari, Fakher, Series Editor, Gherardini, Francesco, Series Editor, Ivanov, Vitalii, Series Editor, Cavas-Martínez, Francisco, Editorial Board Member, di Mare, Francesca, Editorial Board Member, Haddar, Mohamed, Editorial Board Member, Kwon, Young W., Editorial Board Member, Trojanowska, Justyna, Editorial Board Member, Li, Xianguo, editor, Rashidi, Mohammad Mehdi, editor, Lather, Rohit Singh, editor, and Raman, Roshan, editor

Published
2023
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50. TGRA-Based Optimization of Face Milling of AISI 52100 Alloy Steel for Surface Microhardness and Tool Life

Author

Rana, Mohit, Singh, Talvinder, Sharma, Vijay Kumar, Singh, Kamaljeet, Aggarwal, Pallavi, Chaari, Fakher, Series Editor, Gherardini, Francesco, Series Editor, Ivanov, Vitalii, Series Editor, Cavas-Martínez, Francisco, Editorial Board Member, di Mare, Francesca, Editorial Board Member, Haddar, Mohamed, Editorial Board Member, Kwon, Young W., Editorial Board Member, Trojanowska, Justyna, Editorial Board Member, Li, Xianguo, editor, Rashidi, Mohammad Mehdi, editor, Lather, Rohit Singh, editor, and Raman, Roshan, editor

Published
2023
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