Browsing by Author "Miah, Md. Helal"

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Chronological progress in enhancing CIGS solar cell performance through window layer development: Fundamentals, synthesis, optimization
(Elsevier, 2024-11) Amin, Nowshad; Suhaimi, Nadia Hartini; Nur-E-Alam, Mohammad; Yap, Boon Kar; Khan, Sobayel; Miah, Md. Helal; Islam, Mohammad Aminul; Tiong, Sieh Kiong; Das, Narottam; Khandakher, Mayeen Uddin
Several factors, particularly the material of the window layer, contribute to the efficiency of CIGS solar cells. To optimize light absorption and reduce energy losses, it is critical to select the appropriate material for the window layer development. Thus, the main emphasis of this review is on the development of window layers, covering fundamental concepts, synthesis techniques, characterization methods, and optimization strategies. Metal oxides and doped metal oxides are critical materials for optimizing charge carrier flow, minimizing energy loss, and elevating sunlight transmission to the CIGS absorber. Despite tremendous progress, difficulties such as increased conductivity, transparency, stability, and cost-effectiveness remain. Discovering novel materials, specific combinations, and improved deposition techniques offers further details on the structure-property relationships of window layers. Addressing these difficulties is critical to improving the performance of CIGS solar cells, which are now approximately 23.6 % efficient. These enhancements are critical for progressing sustainable energy solutions.
Optimization and Detail Analysis of Novel Structure Pb-Free CsGeI3-Based All-Inorganic Perovskite Solar Cells by SCAPS-1D
(Elsevier, 2023-06-15) Miah, Md. Helal; Rahman, Md. Bulu; Khatun, Fatema; Khandaker, Mayeen Uddin; Hatta, Sharifah Fatmadiana Wan Muhammad; Soin, Norhayati Binti; Islam, Mohammad Aminul
In this work, a novel structure of all inorganic PSC (TCO/TiO2/CsGeI3/MoO3/Back Metal contact) has been numerically investigated and optimized. Initially, we simulated the structure by using different optoelectronic parameters found in literature that are substantiated theoretically and experimentally and obtained a PCE of 19.81%. After that, we have turned up a detailed analysis by varying the parameters including the thickness of the light-harvesting layer, ETL, and HTL, bulk defects and amphoteric defect of the light-harvesting layer, interfacial defects, operating temperature, series resistance, and work function to obtain optimum values. The efficiency as high as 22.85% has been achieved along with Voc = 1.16 Volt, Jsc = 23.97 mA/cm2, and FF = 82.25%, respectively for the optimized structure of PSC. We also investigated the capacitance-voltage (C-V) and Mott-Schottky (MS) plots for in depth understanding of the performance variation. The detailed analysis and optimized parameters of this study, we believe, will be useful in synthesising toxic element-free CsGeI3-based all-inorganic PSCs with higher efficiency and stability, paving the way for PSC commercialization.
Perovskite materials in X-ray detection and imaging: recent progress, challenges, and future prospects
(2024-06-15) Miah, Md. Helal; Khandaker, Mayeen Uddin; Aminul Islam, Mohammad; Nur-E-Alam, Mohammad; Osman, Hamid; Ullah, Md. Habib
Perovskite materials have attracted significant attention as innovative and efficient X-ray detectors owing to their unique properties compared to traditional X-ray detectors. Herein, chronologically, we present an in-depth analysis of X-ray detection technologies employing organic–inorganic hybrids (OIHs), all-inorganic and lead-free perovskite material-based single crystals (SCs), thin/thick films and wafers. Particularly, this review systematically scrutinizes the advancement of the diverse synthesis methods, structural modifications, and device architectures exploited to enhance the radiation sensing performance. In addition, a critical analysis of the crucial factors affecting the performance of the devices is also provided. Our findings revealed that the improvement from single crystallization techniques dominated the film and wafer growth techniques. The probable reason for this is that SC-based devices display a lower trap density, higher resistivity, large carrier mobility and lifetime compared to film- and wafer-based devices. Ultimately, devices with SCs showed outstanding sensitivity and the lowest detectable dose rate (LDDR). These results are superior to some traditional X-ray detectors such as amorphous selenium and CZT. In addition, the limited performance of film-based devices is attributed to the defect formation in the bulk film, surfaces, and grain boundaries. However, wafer-based devices showed the worst performance because of the formation of voids, which impede the movement of charge carriers. We also observed that by performing structural modification, various research groups achieved high-performance devices together with stability. Finally, by fusing the findings from diverse research works, we provide a valuable resource for researchers in the field of X-ray detection, imaging and materials science. Ultimately, this review will serve as a roadmap for directing the difficulties associated with perovskite materials in X-ray detection and imaging, proposing insights into the recent status, challenges, and promising directions for future research.
Perovskite Materials in X-ray Detection and Imaging: Recent Progress, Challenges, and Future Prospects
(The Royal Society of Chemistry, 2024-02-22) Miah, Md. Helal; Khandaker, Mayeen Uddin; Islam, Mohammad Aminul; Nur-E-Alam, Mohammad; Osman, Hamid; Ullah, Md. Habib
Perovskite materials have attracted significant attention as innovative and efficient X-ray detectors owing to their unique properties compared to traditional X-ray detectors. Herein, chronologically, we present an in-depth analysis of X-ray detection technologies employing organic–inorganic hybrids (OIHs), all-inorganic and lead-free perovskite material-based single crystals (SCs), thin/thick films and wafers. Particularly, this review systematically scrutinizes the advancement of the diverse synthesis methods, structural modifications, and device architectures exploited to enhance the radiation sensing performance. In addition, a critical analysis of the crucial factors affecting the performance of the devices is also provided. Our findings revealed that the improvement from single crystallization techniques dominated the film and wafer growth techniques. The probable reason for this is that SC-based devices display a lower trap density, higher resistivity, large carrier mobility and lifetime compared to film- and wafer-based devices. Ultimately, devices with SCs showed outstanding sensitivity and the lowest detectable dose rate (LDDR). These results are superior to some traditional X-ray detectors such as amorphous selenium and CZT. In addition, the limited performance of film-based devices is attributed to the defect formation in the bulk film, surfaces, and grain boundaries. However, wafer-based devices showed the worst performance because of the formation of voids, which impede the movement of charge carriers. We also observed that by performing structural modification, various research groups achieved high-performance devices together with stability. Finally, by fusing the findings from diverse research works, we provide a valuable resource for researchers in the field of X-ray detection, imaging and materials science. Ultimately, this review will serve as a roadmap for directing the difficulties associated with perovskite materials in X-ray detection and imaging, proposing insights into the recent status, challenges, and promising directions for future research.