تجاوز إلى المحتوى الرئيسي
User Image

سيف مبخوت حمود قايد Saif MABKHOT HAMOOD QAID

Assistant Professor

عضو هيئة تدريس بقسم الفيزياء والفلك

كلية العلوم
College of Science, Physics and Astronomy Dept. Office 2A23
المنشورات
مقال فى مجلة
2015
تم النشر فى:

Invoking the frequency dependence in square modulated light intensity techniques for the measurement of electron time constants in dye-sensitized solar cells

Ghaithan, Hamid M. . 2015

Dye-sensitized solar cells (DSSCs) have been considered as one of the most promising new generation solar cells. Enormous research efforts have been invested to improve the efficiency of solar energy conversion which is determined by the light harvesting efficiency, electron injection efficiency and undesirable electron lifetime. A simple, cheap and trustable laser-induced photovoltage and photocurrent decay (LIPVCD) technique is adopted in this work in order to determine the electron lifetime (τe) and electron transport (τtr) in DSSCs. In LIPVCD technique, DSSC is illuminated by a small squared intensity-modulated laser beam. Time-based response of the DSSC is recorded using a transient digitized oscilloscope for further analysis. Frequency-based response was also investigated in this work. The frequency-dependent measurements turned out to be a powerful method to determine electron time constants in a fast, real-time fashion. Measurements were carried out using a standard dye-sensitized solar cell, and results were in excellent agreement with results obtained from traditional IMVSIMPS measurements. Measurements were also performed for a variety of DSSCs, having various electrodes including TiO2 nanoparticles, TiO2 nanosheets with exposed {001} facets and ZnO vertically aligned nanowires. Results will also be presented and discussed in this work.

رقم المجلد
2015
مجلة/صحيفة
(Society of Photo-Optical Instrumentation Engineers (SPIE
الصفحات
955604
مزيد من المنشورات
publications

In the last two decades, the family of metal halide perovskites has received more attention in radiation detection applications. In this work, the radiation detection and dosimetric applicability…

بواسطة S. Aldawood, Syed Mansoor, Ali, Saif M.H. Qaid, Hamid M.Ghaithan, M.S.AlGarawi, Abdullah S.AldwayyanH.KassimAziz A.AzizS.S.AlGamdi
2022
تم النشر فى:
Elsevier
publications

The high crystal quality of formamidium lead bromide perovskite (CH(NH2)2PbBr3 = FAPbBr3) was infiltrated in a mesoporous TiO2 network.

بواسطة Saif MH Qaid, Hamid M Ghaithan, Khulod K AlHarbi, Abrar F Bin Ajaj, Bandar Ali Al-Asbahi, Abdullah S Aldwayyan
2022
تم النشر فى:
Multidisciplinary Digital Publishing Institute
publications

Tuning the emission spectrum of both binary hybrids of poly (9,9′-di-n-octylfluorenyl-2,7-diyl) (PFO) with each poly[2-methoxy-5-(2-ethylhexyloxy)-1,4-phenylenevinylene] (MEH-PPV) and poly[2-…

بواسطة Bandar Ali Al-Asbahi, Mohamad S AlSalhi, Amanullah Fatehmulla, Mohammad Hafizuddin Hj Jumali, Saif MH Qaid, Wafa Musa Mujamammi, Hamid M Ghaithan
2021
تم النشر فى:
Multidisciplinary Digital Publishing Institute