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All Journal Jurnal Elektronika dan Telekomunikasi Juwara : Jurnal Wawasan dan Aksara
Evi Nur Azizah, Evi Nur
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Religion Humanities Computer Science & IT Education Electrical & Electronics Engineering Engineering Languange, Linguistic, Communication & Media Mathematics Physics Social Sciences Other

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Comparative Analysis of Charge Recombination Dynamics in Dye-Sensitized Solar Cells with different Counter Electrodes Azizah, Evi Nur; Nurhayati, Nunik; Al Jazeera, Lalu Jihad; Yuliantini, Lia; Hatta, Mohammad; Amrillah, Tahta; Nursam, Natalita Maulani; Firdaus, Yuliar
Jurnal Elektronika dan Telekomunikasi Vol 25, No 1 (2025)
Publisher : National Research and Innovation Agency

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.55981/jet.703

Abstract

Counter electrodes are essential in dye-sensitized solar cells (DSSCs) for facilitating charge transfer and catalyzing the regeneration of the electrolyte, impacting overall efficiency. Common counter electrode materials include platinum (Pt), poly(3,4-ethylenedioxythiophene)-poly(styrenesulfonate) (PEDOT:PSS), and graphene, each with distinct advantages and challenges. Pt, a traditional choice, offers excellent catalytic activity but is expensive and scarce. PEDOT:PSS, a conductive polymer, is cost-effective and easily deposited but often suffers from high recombination losses and lower efficiency. Graphene, known for its high conductivity and large surface area, is emerging as a promising alternative. However, a lack of comparative studies on how different counter electrode materials influence recombination dynamics limits the understanding needed for optimizing DSSC performance. This study addresses this gap by examining Pt, graphene, and PEDOT:PSS -based counter electrodes, analyzing their effects on charge transfer, recombination behaviour, and efficiency through J-V measurements, charge extraction, and transient photocurrent (TPC) as well as transient photovoltage (TPV) analyses. Graphene-based DSSCs show superior performance, achieving the highest photocurrent density and power conversion efficiency up to 5.12% at an intensity equivalent to 1 sun (100 mWcm-2), due to enhanced charge extraction and minimized recombination. TPC data reveal that graphene supports faster charge transport, while TPV analysis shows longer electron lifetimes than PEDOT:PSS-based DSSCs. In contrast, PEDOT:PSS-based DSSCs exhibit high recombination losses, lower photocurrent, and s-shaped J-V curves, indicating high resistance of limited charge transfer efficiency. These findings highlight graphene’s potential as an optimal counter electrode material for efficient, high-performance DSSCs.
Pengaruh Penerapan Tata Tertib Terhadap Kedisiplinan Peserta Didik di SMK Bina Pangudi Luhur Jakarta Azizah, Evi Nur; Firdaus, Firdaus; Ulfah, Maria
Juwara: Jurnal Wawasan dan Aksara Vol. 4 No. 2 (2024)
Publisher : Yayasan Pendidikan dan Pengembangan Harapan Ananda

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58740/juwara.v4i2.223

Abstract

This research is motivated by the fact that students' indiscipline in following school rules often becomes a problem, especially at the secondary school level, when students grow up and begin to learn to recognize their identity through imitation or self-imitation. To overcome this problem, sanctions are imposed. The purpose of imposing sanctions is to provide a deterrent effect to students who violate the rules to anticipate repetition of rule violations by students. The research method in this study is the "descriptive analytical correlational" method. X and XI SMK Bina Pangudi Luhur Jakarta. The population in this study was 104 students, and the sample was 82 students. The research method technique uses simple random sampling, to analyze data with product moment correlation (rxy) and hypothesis testing (t test. The results of the research show that the application of regulations has a fairly strong or high correlation, namely 0.40 – 0.50. This It can be proven from the results of testing the hypothesis that the application of rules and regulations has a positive and significant influence on the discipline of students in classes 10 and 11 of Bina Pangudi Luhur Vocational School, Jakarta, namely the calculated t value is 0.450 > 1,990 or positive with a significance level of 0.000 < 0.05, which means that The hypothesis in this study rejects H0 and accepts Ha.
Co-Authors Al Jazeera, Lalu Jihad Firdaus Firdaus Firdaus, Yuliar Hatta, Mohammad Maria Ulfah Nursam, Natalita Maulani Tahta Amrillah Yuliantini, Lia