Solar cells based on natural dyes prepared using anatase phase titanium dioxide

Falah H. Ali

doi:10.30723/ijp.v16i39.99

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Publication Date

Sat Jan 05 2019

Journal Name

Iraqi Journal Of Physics

Volume

16

Issue Number

39

DOI

10.30723/ijp.v16i39.99

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Solar cells based on natural dyes prepared using anatase phase titanium dioxide

Natural dye

low cost

DSSC

efficiency.

Falah H. Ali

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Natural dye sensitized solar cell was prepared using strawberry and pomegranate dyes with anatase nanocrystalline titanium dioxide powder. A study of the optical properties of the two dyes, involving the absorption spectrum was determined in the visible region. I-V characteristics under illumination were performed. The results showed that the two prepared dye sensitized solar cells have acceptable values efficiency about (0.94 with Fill factor (45)) and (0.74 with Fill factor (44)) for strawberry and pomegranate dyes, respectively.

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Publication Date

Sat Feb 01 2020

Journal Name

International Journal Of Electrical And Computer Engineering (ijece)

PSS/E based placement wind/PV hybrid system to improve stability of Iraqi grid

Nadheer A.

Yasar N.

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<span lang="EN-US">Proper employment of Hybrid Wind/ PV system is often implemented near the load, and it is linked with the grid to study dynamic stability analysis. Generally, instability is because of sudden load demand variant and variant in renewable sources generation. As well as, weather variation creates several factors that affect the operation of the integrated hybrid system. So this paper introduces output result of a PV /wind via power electronic technique; DC chopper; that is linked to Iraqi power system to promote the facilitating achievement of Wind/ PV voltage. Moreover, PSS/E is used to study dynamic power stability for hybrid system which is attached to an effective region of Iraqi Network. The hybrid system

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Fri Jul 01 2022

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Optical Fiber Technology

Highly sensitive fiber Bragg grating based gas sensor integrating polyaniline nanofiber for remote monitoring

H.A.

Bashar

M.H.

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Thu Jul 01 2021

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Applied Thermal Engineering

Consecutive charging and discharging of a PCM-based plate heat exchanger with zigzag configuration

Pouyan

Jasim M.

Hayder

M.A.

Amir

Mohammad

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Thu Dec 14 2023

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Iete Journal Of Research

Performance Enhancement of VLC-NOMA Employing Beamforming Function based vehicle-to-multivehicle Communication system

Lwaa Faisal

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Sat Jul 01 2023

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Journal Of Engineering

Silica Fume Modified Cement-Based Mortar Exposed to High Temperatures: Residual Strengths and Microstructure

Elevated Temperatures

Silica Fume

Cement-Based Mortars

Shahad Jafeer

Maan Salman

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Several previous investigations and studies utilized silica fume (SF) or (micro silica) particles as supplementary cementitious material added as a substitute to cement-based mortars and their effect on the overall properties, especially on physical properties, strength properties, and mechanical properties. This study investigated the impact of the inclusion of silica fume (SF) particles on the residual compressive strengths and microstructure properties of cement-based mortars exposed to severe conditions of elevated temperatures. The prepared specimens were tested and subjected to 25, 250, 450, 600, and 900 °C. Their residual compressive strengths and microstructure were evaluated and compared with control samples (C

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(4)

Publication Date

Wed Jan 01 2020

Journal Name

International Journal Of Computing

Twitter Location-Based Data: Evaluating the Methods of Data Collection Provided by Twitter Api

location data

Social media

Twitter

N.A.

Haneen

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Twitter data analysis is an emerging field of research that utilizes data collected from Twitter to address many issues such as disaster response, sentiment analysis, and demographic studies. The success of data analysis relies on collecting accurate and representative data of the studied group or phenomena to get the best results. Various twitter analysis applications rely on collecting the locations of the users sending the tweets, but this information is not always available. There are several attempts at estimating location based aspects of a tweet. However, there is a lack of attempts on investigating the data collection methods that are focused on location. In this paper, we investigate the two methods for obtaining location-based dat

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Publication Date

Mon Feb 01 2021

Journal Name

Environmental Monitoring And Assessment

GIS-based assessment of groundwater quality for drinking and irrigation purposes in central Iraq

Zaid F.

Ali Adel

Sama M.

Rwayda Kh. S.

Lee S.

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Wed Jan 01 2025

Journal Name

International Journal Of Electrical And Electronic Engineering & Telecommunications

5G New Radio LDPC Codes Based Generalized Joint Subcarrier-Time Index Modulation DCSK System

MUuntaha Kadhum

Fadhil Sahib

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Low-Density-Parity-Check (LDPC) codes are a cornerstone for achieving robust error correction capabilities in 5G New Radio applications, significantly improving the reliability of data transmission across noisy and unpredictable wireless channels. Since an evaluation and discussion of the performance with channel coding is significantly absent in two-dimensional Index Modulation (IM)-Differential Chaos Shift Keying (DCSK) schemes. Therefore, in this study, the 5G new radio LDPC codes based generalized joint subcarrier-time index modulation DCSK system (5G NR-LDPC-GJSTIM-DCSK) is proposed, where 5G NR-LDPC codes are used as channel coding. The aim is to improve the system’s performance specifically across AWGN (additive white gauss

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Publication Date

Mon Apr 01 2019

Journal Name

Journal Of Educational And Psychological Researches

The Effectiveness of a Teaching Strategy Based on the Cognitive Model of Daniel in the Development of Achievement and the Motivation of learning the School Mathematics among the Third Intermediate Grade Students

Mathematics teaching

cognitive model of Daniel

achievement

learning motivation

Hilal Ibn Mezel Al-Enezi

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This research aims to examine the effectiveness of a teaching strategy based on the cognitive model of Daniel in the development of achievement and the motivation of learning the school mathematics among the third intermediate grade students in the light of their study of "Systems of Linear Equations”. The research was conducted in the first semester (1439/1440AH), at Saeed Ibn Almosaieb Intermediate School, in Arar, Saudi Arabia. A quasi-experimental design has been used. In addition, a (pre & post) achievement test (20 Questions) and a (pre & post) scale of learning motivation to the school mathematics (25 Items) have been applied on two groups: a control group (31Students), and an experimental group (29 Students). The resear

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Publication Date

Mon Apr 06 2020

Journal Name

August

INFLUENCE OF SOME FACTOR ON SOMATIC EMBRYOS INDUCTION AND GERMINATION OF DATE PALM CV BARHI BY USING CELL SUSPENSION CULTURE TECHNIQUE

This study was done to examine different concentrations of mercuric chloride (Hgcl2) for Explants sterilization and different concentration of NAA) mg/L with 2iP for their effect on initiation primary callus and subsequent embryogenesis in Phoenix dactyliferae cultivar Barhi. Leaf primordial and shoot tips were excised from 2-3 years old offshoot. The result showed that contamination percentage decreased with an increase in concentration of Hgcl2 for two explants where in the control (0.0)% gave highest value 75% and 62.5% of contamination for leaf primordial and shoot tip respectively while the addition (0.1)% gave a significant decrease 37.5 and 0% for explants respectively. The Explants were inoculated onto Murashiege and Skoog

1962 (MS) medium supplemented with 2iP 3mg/L and containing 0

25

50 or 100 mg/L of NAA

the addition (50) mg/L of NAA gave highest value 68.8% in percentage of callus initiation with significant difference from addition 0% gave lowest value (18.8)%

as well Explants of shoot tip gave significant difference was 53.1% while leaf primordial gave 28.1%

Primary callus was transferred to fresh MS medium containing (0

5

10 and 20) mg/L of NAA with 3mg/L 2iP

Results were recorded after 12 weeks. A highest value of embryonic callus induction percentage or fresh weight and dry weight 87.5% or 1.56g and 0.47g for the character respectively for the treat 20 mg/L while control treatment 0.0 gave the lowest value 12.5% or 0.37g and 0.14g for same character respectively. Inoculated 1g fresh biomass into a 250 ml Erlenmeyer flask containing 50 ml MS liquid medium supplemented with NAA 20mg/L and agitated at 150 rpm by shaker to making suspension culture the measurements of packed cell volume ( pcv) or fresh and dry weight taken weekly for 12 weeks

maximum values were reached in the eighth week of PCV and fresh weight but the dry weight reached to highest value in seventh week

then the curve began to decline gradually until it reached stability in the last two weeks. The cell suspension was Diluted to different initial cell density of 100

500

10000

50000 and 100000 cells /ml with hemocytometer. The initial cell number of (10000) cells gave significant different of plating efficiency PE (11.6)% while (100) cells gave lowest value 1.8% of PE.

Ali A.

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