Study Optical Properties Of Organic Thin Films And Its Application On Solar Cell | ||||
| البحوث التطبيقية في العلوم والانسانيات | ||||
| Volume 1, Issue 1, July 2024, Page 75-84 PDF (2.03 MB) | ||||
| Document Type: المقالة الأصلية | ||||
| DOI: 10.21608/aash.2024.376811 | ||||
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| Authors | ||||
| Alaa alaa Ahmed abd elgawad; Samia Wael Kamal Osman; Samaa Elsayed Mahmoud; Fatma elzahraa Mahmoud Mostafa Abd elazeem; Mena Allah Ahmed Atia; Nourhan Farid Hamed Eid; Hagar Khaled Abdalhameed Abdalhameed . Mandor; Gehan Farouk Abdou Salem | ||||
| Professor of Physics, specializing in Materials Science E-mail address: gehanfarouk@edu.asu.edu.eg Faculty of Education- Ain Shams University, | ||||
| Abstract | ||||
| Several advantages are available with organic semiconductors, including easy synthesis, straightforward purification, high solubility, inexpensive manufacture, and significant industrial significance. Therefore, materials for large-scale electrical and optoelectronic devices made of organic semiconductors show promise. Therefore, studying the optical properties of these materials is very important not only for designing the devices, but also for knowing their absorption limits, determine the type of optical transition and the optical energy gap value to assess their viability for solar cell fabrication. For instance, we investigated the optical characteristics of thin films of 4-dimethylaminobenzylidenemalononitrile (DBM). Through the process of thermal evaporation, the (DBM) thin films were created. Deposition was carried out on clean optical flat fused quartz substrates for optical measurements at room temperature and at two different thermal annealing temperatures of 323 and 373 K. Using a double-beam spectrophotometer, the transmittance T(λ) and reflectance R(λ) of DBM thin films with a thickness of 480 nm were measured in the 200–2500 nm spectral region. It is possible to determine the absorption index (k) and refractive index (n). Calculations were made for the optical energy gap and Urbach energy at ambient temperature as well as at various thermal annealing temperatures (323 and 373K). It was found that the indirect energy gap increases with increasing thermal annealing from 0.9325 eV for thin film as - deposited to 0.9575 eV at 373. The optical characteristics of DBM films can be changed by thermal annealing, which has numerous significant uses, including high-capacity communications networks.. This means that the material is suitable for use in manufacturing solar cells. | ||||
| Keywords | ||||
| Optical constants; Refractive index; Absorption index; Thermal annealing | ||||
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