Ukrainian Journal of Physical Optics


2026 Volume 27, Issue 2


ISSN 1816-2002 (Online), ISSN 1609-1833 (Print)

IN-DEPTH NUMERICAL EVALUATION AND PERFORMANCE OPTIMIZATION OF CMTS PHOTODETECTOR

S. Yasin, Z. Abu Waar, S. Christopoulos and M. Moustafa

Author Information
1,*S. Yasin SCOPUS logo, 2Z. Abu Waar ORCID logo SCOPUS logo, 3S. Christopoulos ORCID logo SCOPUS logo, 4M. Moustafa ORCID logo SCOPUS logo
1College of Integrative Studies, Abdullah Al Salem University, Khaldiya, Kuwait
2Department of Physics, College of Science, The University of Jordan, Amman, 11942, Jordan
3Sorbonne University Abu Dhabi, SAFIR, Novel Materials Development Laboratory, Abu Dhabi, United Arab Emirates
4Department of Physics, School of Sciences and Engineering, The American University in Cairo, New Cairo 11835, Egypt.
* Corresponding Author: shadi.yasin@aasu.edu.kw

ABSTRACT

Photodetectors are essential elements in a wide range of technological fields, especially for advanced photosensing applications. This study presents a detailed numerical assessment and optimization of the performance of Copper Manganese Tin Sulfide (CMTS) layers, with particular focus on the absorber layer in a photodetector device. The investigation focuses on the influence of various design parameters, with an emphasis on maximizing the efficiency and functionality of the Fluorine-doped Tin Oxide (FTO)/CMTS/Au structure. A comprehensive numerical analysis of the physical properties of the CMTS absorber layer identifies, within the studied range, the optimal thickness, bandgap, doping density, and electron-hole mobility for enhanced photodetector performance at 1000 nm, 1.3 eV, 1×1014cm-3, and 28 cm2/Vs, respectively. Additionally, the influence of the incident light wavelength on photodetector behaviour is explored. The results indicate that the device performs optimally with an incident light wavelength of 800 nm. Under these optimized values and conditions, the photodetector achieves a responsivity of 0.56 A/W and a detectivity of 5.17×1013 Jones. These results demonstrate that the proposed device offers a promising pathway toward cost-effective, easily fabricated, and robust photodetectors, establishing it as a highly promising material for future photosensing technology.

Keywords: photodetector, copper-manganese-tin sulfide, responsivity, detectivity, solar cell capacitance simulator

UDC: 535.2

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    Фотодетектори є важливими елементами в широкому спектрі технологічних галузей, особливо для передових застосувань фоточутливості. Це дослідження представляє детальну числову оцінку та оптимізацію продуктивності шарів сульфіду міді-марганцю-олова (CMTS), зосереджуючись на функції поглинального шару у фотодетекторному пристрої. Дослідження зосереджене на аналізі впливу різних конструктивних параметрів, з акцентом на максимізацію ефективності та функціональності структури легованого фтором оксиду олова (FTO)/CMTS/Au. Комплексний чисельний аналіз фізичних властивостей поглинального шару CMTS дозволив визначити у досліджуваному діапазоні оптимальну товщину, ширину забороненої зони, концентрацію легування та електрон-діркову рухливість для підвищеної ефективності фотодетектора, які становлять відповідно 1000 нм, 1,3 еВ, 1×1014см-3 та 28 см2/с. Крім того, досліджено вплив довжини хвилі падаючого світла на поведінку фотодетектора. Результати показують, що пристрій демонструє оптимальну роботу при довжині хвилі падаючого випромінювання 800 нм. За цих оптимізованих значень та умов фотодетектор досягає чутливості 0,56 А/Вт та детективності 5,17×1013 Джонса. Отримані результати свідчать, що запропонований пристрій є перспективним для створення економічно ефективних, технологічно простих у виготовленні та надійних фотодетекторів, що робить його дуже перспективним матеріалом для майбутніх технологій фоточутливості.

    Ключові слова: фотодетектор, CMTS, чутливість, детективність, SCAPS

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