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Strain Dependent Performance Analysis of InGaN Multi-junction Solar Cell
Md. Aminur Rahman,Md. Jahirul Islam,Md. Rafiqul Islam,M. A. Parvez Mahmud 한국전기전자재료학회 2021 Transactions on Electrical and Electronic Material Vol.22 No.6
This study reports the strain-dependent efficiency of the InGaN-based multi-junction solar cell (MJSC) for the first time. The route of strain in MJSC is identifi ed to be the results of dissimilar lattice constants between layers of sub-cell grown epitaxially with bandgap stepping. Utilising multi-layered strain model, the state of strain and its magnitude is evaluated for three types of MJSC structures referred to as MJSC-1, MJSC-2, and MJSC-3. It is found that the MJSC position-dependent strain is strongly dependent on the sub-cell thickness as well as on the number of sub-cells. Employing the MJSC position-dependent strain in combination with deformation potentials, strain-induced energy bandgap is calculated when imposed under tensile strain condition. Finally, the strain-dependent efficiencies of different MJSC structures are estimated and obtained to be lower with that of reported with strain effects over sighted. The loss of efficiency is identifi ed to be due to the open circuit voltage which decreases under tensile strain condition. Among the MJSC structures studied here, MJSC-3 with 7-layers is less efficient and its efficiency decreases up to 3.01% when strain effect is taken into consideration.
ALAM, Md. Kausar,MUSTAFA, Hasri,UDDIN, Md. Salah,ISLAM, Md. Jahirul,MOHUA, Marjea Jannat,HASSAN, Md. Farjin Korea Distribution Science Association 2020 The Journal of Asian Finance, Economics and Busine Vol.7 No.3
The study aims to explore the problems of the existing Shariah Governance Framework (SGF) and its concerned authorities in the context of Bangladesh. Thus, according to responses from 17 respondents, this study outlines that Bangladesh has an absence of a shortage of experts, experienced, knowledgeable, and qualified Shariah people at all levels (i.e., the central bank, Islamic banks, Shariah Supervisory Boards (SSBs), and regulators). Therefore, Bangladesh does not have a separate Islamic banking act, Shariah audit firm, Shariah index institutions, and comprehensive SGF. The existing guideline has a limitation concerning its comprehensiveness, accountability, responsibility, and structure of SSBs. Islamic banks do not follow the instruction of the central bank in the formation of SSBs. As a result, there is an absence of competent and qualified SSB, which also results in the functions of Shariah departments as well as Shariah applications. Usually, the Board of Directors (BOD), management, executives, customers, and the public also have the conceptual gap about Islamic banks, SGF, and banking system compared to the regular prayers, faith, and belief. Concisely, Bangladesh requisites a comprehensive SGF, Islamic banking act, a standard accounting system, and a robust Shariah audit system for the overall development of Islamic banks and SGF.
Breeding and Evaluation of Cultivation Adaptability of New Medicinal Hemp Clone ‘Pink pepper’
Byeong Ryeol Ryu(류병렬),Eun Ji Go(고은지),Gyeong Ju Gim(김경주),Ye Rim Shin(신예림),Md Jahirul Islam,Md Obyedul Kalam Azad,Md Hafizur Rahman,Md Rana Soyel,Tae Hyung Kwon(권태형),Chang Hyuck Kim(김창혁),Joon Hee Han(한준 한국약용작물학회 2022 한국약용작물학회 학술대회논문집 Vol.2022 No.1