Study on Photoelectrochemical Performance of ZnO Nanotube /CdSeQuantum Dot-Sensitized Solar Cell

2011 ◽  
Vol 399-401 ◽  
pp. 1429-1432 ◽  
Author(s):  
Ping Fang Tao ◽  
Jun He ◽  
Chun Jie Liang ◽  
Jian Peng Han ◽  
Li Qin Qin ◽  
...  
Keyword(s):  
Solar Cell ◽  
Quantum Dot ◽  
Power Conversion ◽  
X Ray Diffraction ◽  
Photoelectrochemical Property ◽  
Photoelectrochemical Performance ◽  
X Ray ◽  
Zno Nanotube ◽  
Zno Nanotubes ◽  
Scanning Electron

ZnO; Quantum Dot-sensitized Solar Cell; CdSe; Photoelectrochemical property Abstract: ZnO nanotubes (NTs) were successfully fabricated with a hydrothermal method at low temperature. X-ray diffraction (XRD) and scanning electron microscopy (SEM) have been utilized to characterize the samples. The ZnO nanotubes, sensitized by CdSe, were used as a photoanode of a quantum dot sensitized solar cell, which generated a maximum power conversion efficiency of 0.95%.

Efficiency Enhancement by Insertion of ZnO Recombination Barrier Layer in CdS Quantum Dot-Sensitized Solar Cells

2021 ◽  
Vol 21 (7) ◽  
pp. 3800-3805
Author(s):  
Abdul Razzaq ◽  
Muhammad Zafar ◽  
Tahir Saif ◽  
Jun Young Lee ◽  
Jung Ki Park ◽  
...  
Keyword(s):  
Solar Cell ◽  
Quantum Dot ◽  
Barrier Layer ◽  
Open Circuit ◽  
X Ray Diffraction ◽  
Solar Cell Performance ◽  
X Ray ◽  
Cds Quantum Dot ◽  
Back Transfer ◽  
Photovoltaic Characteristics

In this investigation we report the formation of thin ZnO recombination barrier layer at TiO2/CdS interface aimed for the improvement in performance of CdS sensitized solar cell. The film was deposited upon nanocrystalline mesoporous TiO2 surface by following a simple chemical process and characterized, using UV-Visible spectroscopy, X-ray diffraction and electron dispersive X-ray measurements. The insertion of ZnO thin layer enhances the QDSC (Quantum dot sensitized solar cell) performance, contributed mainly by an increase in open circuit voltage (Voc) due to reduced electron back transfer from TiO2 conduction band. Moreover, the analysis of photovoltaic characteristics upon increasing the thickness of the ZnO film reveals that the ZnO recombination barrier layer with optimum thickness at porous TiO2/CdS interface proved to be an effective potential barrier for minimizing electron back recombination.

Photoelectrochemical Activity of Cu-Loaded TiO2 Nanotube Arrays by AC Electrodeposition

2014 ◽  
Vol 602-603 ◽  
pp. 980-984 ◽  
Author(s):  
Jian Ling Zhao ◽  
Qiao Wen Fan ◽  
Ying Juan Mi ◽  
Jing Yang ◽  
Xi Xin Wang
Keyword(s):  
Nanotube Arrays ◽  
X Ray Diffraction ◽  
Photoelectrochemical Property ◽  
Photoelectrochemical Activity ◽  
Solution Deposition ◽  
X Ray ◽  
Cu Content ◽  
Novel Approach ◽  
Deposition Voltage ◽  
Scanning Electron

This work presents a novel approach for preparing Cu-loaded TiO2 nanotube arrays through alternating current electrodeposition. The Cu content loaded on the arrays was controlled by changing the concentration of Cu (NO3)2 solution, deposition voltage and time. The surface morphology and crystal structure of Cu-loaded TiO2 nanotube arrays were characterized by scanning electron microscopy (SEM) and the X-ray diffraction (XRD). The effects of Cu content on the photoelectrochemical property were studied in detail. Results show that Cu-loaded TiO2 nanotube arrays have evidently enhanced photoelectrochemical activity. The photocurrent of Cu-loaded TiO2 nanotube arrays prepared in 0.00625 mol/L Cu (NO3)2 solution at 12 V for 20 seconds was 5.7 and 2.3 times as that of unloaded TiO2 nanotube arrays under visible and UV radiation, respectively.

scholarly journals Karakteristik Pasta TiO2 Suhu Rendah untuk Aplikasi Dye Sensitized Solar Cell (DSSC)

2016 ◽  
Vol 14 (1) ◽  
pp. 24
Author(s):  
Mariya Al Qibtiya ◽  
Lia Muliani ◽  
Jojo Hidayat
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Solar Cell ◽  
Ruthenium Complex ◽  
Dye Sensitized Solar Cell ◽  
X Ray Diffraction ◽  
Scattering Layer ◽  
X Ray ◽  
Dye Sensitized ◽  
Scanning Electron

Pada tulisan ini, diuraikan karakteristik pasta TiO2 suhu rendah untuk aplikasi sel surya berbasis dye-sensitized yang dipreparasi dengan penambahan serbuk TiO2 reflektor. Penambahan TiO2 reflektor sebagai light scattering layer pada pasta dilakukan untuk melihat pengaruhnya terhadap karakteristik listrik sel surya yang dihasilkan. Preparasi pasta dilakukan menggunakan bahan komersial yaitu pasta T-Nanooxide D-L (Solaronix) dan serbuk pasta WER2-O (Dyesiol) sebagai bahan reflector. Bahan tersebut dianalisis struktur kristalnya. Hasil karakterisasi X-Ray Diffraction (XRD) menunjukan bahwa bahan TiO2 serbuk yang digunakan adalah nanokristal dengan struktur kristal anatase. Pasta ini dideposisi di atas permukaan plastik dan kaca konduktif (ITO-PET dan FTO) dengan metode doctor blade printing. Proses sintering lapisan TiO2 dilakukan pada suhu rendah yaitu 120 ˚C selama 4 jam. Morfologi permukaan lapisan TiO2 dianalisa menggunakan Scanning Electron Microscopy (SEM). Lapisan TiO2 yang terbentuk diaplikasikan pada DSSC sebagai fotoelektroda. Pewarnaan dengan larutan N-719 (Ruthenium Complex), lapisan elektroda kerja platina dan larutan elektrolit iodine. Karakteristik kurva I-V dengan ukuran sel daerah aktif 1 cm2 diukur menggunakan Sun Simulator AM1,5 dengan sumber cahaya Xenon dan intensitas 50 mW/cm2. Hasil pengukuran menunjukkan penambahan serbuk TiO2 reflektor dapat meningkatkan unjuk kerja sel surya fleksibel yang dihasilkan. Efisiensi terbaik DSSC yang dihasilkan adalah 0,166% untuk substrat plastik dan 0,167% untuk substrat kaca.

scholarly journals TỔNG HỢP LỚP FILM BÁN DẪN MẦM TINH THỂ ZNO TRÊN KÍNH DẪN TRONG SUỐT ITO VỚI THIẾT BỊ TỰ CHẾ SPIN – COATING

2021 ◽  
Vol 44 (02) ◽  
Author(s):  
VĂN THANH KHUÊ ◽  
HUỲNH NGUYỄN VIỆT ĐỨC ◽  
VÕ THÀNH CÔNG ◽  
NGUYỄN VĂN TRỌNG
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Solar Cell ◽  
Spin Coating ◽  
X Ray Diffraction ◽  
X Ray ◽  
Scanning Electron ◽  
Spin Coater

Thiết bị spin coater được thiết kế, chế tạo và ứng dụng để tổng hợp vật liệu màng mỏng đồng nhất trên chất nền phẳng với chi phí phù hợp, dễ sử dụng, khả năng hoạt động ở 2 pha tốc độ với khoảng tốc độ điều chỉnh là 300 - 4800 rpm, độ ổn định tốc độ cao và phù hợp với chất nền phẳng có nhiều hình dạng khác nhau với kích thước tối đa 10 cm. Thiết bị được phát triển trên nền tảng Arduino và công nghệ in nhựa 3D . Film bảng mỏng của vật liệu chất bán dẫn mầm tinh thể ZnO phủ trên đế kính dẫn trong suốt ITO có kích thước 25 mm x 25 mm được tổng hợp bằng thiết bị tự chế spin-coater và phương pháp nhiệt. Các phương pháp phân tích hóa lý hiện đại scanning electron microscopy và x-ray diffraction được áp dụng để nghiên cứu hình thái học và cấu trúc tinh thể của lớp vật liệu. Lớp mầm tinh thể ZnO, là giai đoạn quan trọng trước khi phát triển tinh thể với các hình thù khác nhau ứng dụng trong, điện cực quang điện, thiết bị điện tử quang điện hoá như màn hình cảm ứng, cảm biến, transistor, solar cell.

Modification of Working Electrode of Dye-Sensitized Solar Cell Using TiO2 Nanopraticles/TiO2 Nanofibers/CNT Composite

2013 ◽  
Vol 802 ◽  
pp. 32-36
Author(s):  
Wanichaya Mekprasart ◽  
Wirat Jarernboon ◽  
Wicharn Techitdheera
Keyword(s):  
Electron Microscopy ◽  
Solar Cell ◽  
Fill Factor ◽  
Modified Electrodes ◽  
Dye Sensitized Solar Cell ◽  
X Ray Diffraction ◽  
X Ray ◽  
Dye Sensitized ◽  
Working Electrode ◽  
Scanning Electron

The working electrode of dye-sensitized solar cell was modified using composite material of TiO2 particles/TiO2 nanofibers/CNT by doctor blade method. Structural properties of pre-cursor materials and as-prepared working electrodes were well characterized by X-ray diffraction and scanning electron microscopy. The efficiency and relevant parameters of solar cells with modified electrodes were measured. The optimized weight ratios of 1 wt.% TiO2 nanofibers derived from leucoxene and 0.01 wt.% CNT exhibited the highest improvement of DSSC efficiency with solar efficiency of 1.11% and fill factor of 0.32. The increase of current density may be originated from easier electron transfer that occurred in the device with modified TiO2 particles/TiO2 nanofibers/CNT composite.

scholarly journals Fabrication of the Titanium dioxide nanowires on the FTO substrate and evaluating the efficiency power conversion in the dye-sensitized solar cell

2019 ◽  
Vol 24 (2) ◽  
Author(s):  
Noura H. Haran ◽  
Qhatan A.Yousif
Keyword(s):  
Solar Cell ◽  
Fill Factor ◽  
Power Conversion ◽  
Dye Sensitized Solar Cell ◽  
Optimum Conditions ◽  
X Ray Diffraction ◽  
Tio2 Nanowires ◽  
X Ray ◽  
Dye Sensitized ◽  
Photovoltaic Parameters

The present work involves fabricating TiO2 nanowires on the fluoride doped Tin oxideglass substrate by the hydrothermalmethod to use as photoelectrode in the dye-sensitized solar cell together with a counter graphene nanoplatelets. The morphologyand structure of TiO2 nanowires were characterized by the scanning electron microscopy, X-ray diffraction, and energydispersive X-ray spectroscopy. The results emphasized the synthesis of it on the FTO at the optimum conditions such as degreeof temperature and reaction time. The photovoltaic parameters estimated and the solar cell showed the fill factor close to0.304under irradiated with a light source at 85 mW/cm2.

scholarly journals Effect of Ammonium Halide Additives on the Performance of Methyl Amine Based Perovskite Solar Cells

Materials ◽  
2018 ◽  
Vol 11 (8) ◽  
pp. 1417 ◽  
Author(s):  
Do Heo ◽  
Zhengtang Luo ◽  
Soo Kim
Keyword(s):  
Solar Cells ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Power Conversion ◽  
Perovskite Solar Cells ◽  
Molar Ratio ◽  
X Ray Diffraction ◽  
X Ray ◽  
Methyl Amine ◽  
Scanning Electron

CH3NH3PbI3-xClx species were fabricated as light-absorbing layers for perovskite solar cells (PSCs), by employing NH4I, NH4Br, and NH4Cl as additives via annealing at 100 °C for different times. Solutions containing CH3NH3I, PbI2, and PbCl2 (4:1:1 molar ratio) in N,N-dimethylformamide were used to prepare perovskites with NH4I, NH4Br, and NH4Cl as additives, at concentrations of 0.1 M and 0.3 M. The additives helped increase the grain size and reduce pinholes in the perovskite films, as confirmed by field-emission scanning electron microscopy. The X-ray diffraction profiles of CH3NH3PbI3-xClx clearly showed peaks at 14° and 28° for the samples with additives, indicative of crystallinity. The best PSC performance with a power conversion efficiency of 9.13%, was achieved using 0.1 M NH4I by annealing for 5 min, whereas the power conversion efficiency of the perovskite solar cells without additives was 5.40%.

PHOTOELECTRODE WITH LIGHT AND HEAT SYNERGY UTILIZATION BASED ON CdTe/Bi2Te3 NANOROD ARRAYS/NANOLAYER FILM

2013 ◽  
Vol 06 (05) ◽  
pp. 1340004 ◽  
Author(s):  
YUAN DENG ◽  
BINGWEI LUO ◽  
YAO WANG ◽  
LILI CAO ◽  
YONGMING SHI ◽  
...  
Keyword(s):  
Electron Microscopy ◽  
Power Conversion Efficiency ◽  
Conversion Efficiency ◽  
Power Conversion ◽  
Nanorod Arrays ◽  
X Ray Diffraction ◽  
X Ray ◽  
Low Dimension ◽  
Photoelectrochemical Solar Cells ◽  
Scanning Electron

Photoelectrode of CdTe / Bi 2 Te 3 nanorod arrays/nanolayer film is designed for light and heat synergy utilization, which is carried out by two-step synthesis route of magnetron sputtering. The composition and microstructure of CdTe / Bi 2 Te 3 nanorod arrays/nanolayer are determined by powder X-ray diffraction and scanning electron microscopy. Under AM 1.5 G illumination, the power conversion efficiency of CdTe / Bi 2 Te 3 nanorod arrays/nanolayer photoelectrode is 10 times larger than that of CdTe nanorod arrays. It was found that the power conversion efficiency is mainly affected by the thickness of the Bi 2 Te 3 film. These results significantly improve the performance of low-dimension CdTe photoelectrochemical solar cells and also open new possibilities for solar light and heat synergy utilization.

The Use of Advanced Analytical Techniques for Characterization of the Chemical, Physical, and Crystallographic Nature of a Surface

1973 ◽  
Vol 31 ◽  
pp. 132-133 ◽  
Author(s):  
R. E. Herfert
Keyword(s):  
Surface Characterization ◽  
Analytical Techniques ◽  
X Ray Diffraction ◽  
Depth Of Penetration ◽  
X Ray ◽  
The Past ◽  
Transmission Electron ◽  
Scanning Electron

Studies of the nature of a surface, either metallic or nonmetallic, in the past, have been limited to the instrumentation available for these measurements. In the past, optical microscopy, replica transmission electron microscopy, electron or X-ray diffraction and optical or X-ray spectroscopy have provided the means of surface characterization. Actually, some of these techniques are not purely surface; the depth of penetration may be a few thousands of an inch. Within the last five years, instrumentation has been made available which now makes it practical for use to study the outer few 100A of layers and characterize it completely from a chemical, physical, and crystallographic standpoint. The scanning electron microscope (SEM) provides a means of viewing the surface of a material in situ to magnifications as high as 250,000X.

Identification of calcium oxalate crystals in dried or fixed tobacco leaf

1984 ◽  
Vol 42 ◽  
pp. 288-289
Author(s):  
Vicki L. Baliga ◽  
Mary Ellen Counts
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Calcium Oxalate ◽  
Growth And Development ◽  
Polarized Light ◽  
Calcium Oxalate Crystals ◽  
X Ray Diffraction ◽  
X Ray ◽  
Transmission Electron ◽  
Scanning Electron

Calcium is an important element in the growth and development of plants and one form of calcium is calcium oxalate. Calcium oxalate has been found in leaf seed, stem material plant tissue culture, fungi and lichen using one or more of the following methods—polarized light microscopy (PLM), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and x-ray diffraction.Two methods are presented here for qualitatively estimating calcium oxalate in dried or fixed tobacco (Nicotiana) leaf from different stalk positions using PLM. SEM, coupled with energy dispersive x-ray spectrometry (EDS), and powder x-ray diffraction were used to verify that the crystals observed in the dried leaf with PLM were calcium oxalate.

Sign in / Sign up

Export Citation Format

Share Document