Analisis Performa DSSC dengan Ekstrak Daun Pepaya terhadap Lama Perendaman Kaca ITO (Kajian Teori)

Ashari Ashari, Muslimin Muslimin — Tue, 31 Dec 2024 00:00:00 +0000

Dye Sensitized Solar Cell is a third-generation solar cell made from organic materials that absorbs sunlight energy to be converted into electrical energy. Dye Sensitized Solar Cell components come from ITO glass, papaya leaf extract chlorophyll, TiO₂ powder, electrolyte solution, and pencil carbon which are arranged in a layered combination of donor and acceptor structures. The aim of this research was to determine the performance of Dye Sensitized Solar Cell solar cells with papaya leaf extract for soaking ITO glass for 30 minutes and 120 minutes. The research method uses mixed analysis (a combination of analysis and experimentation). Soaking the ITO glass for 30 minutes produced chlorophyll a 22,69 mg/L, chlorophyll b 57,50 mg/L, total chlorophyll 80,19 mg/L, variable Isc 1400 × 10^-3 A, variable Voc 235 × 10^-3 V, variable Fiil Factor 0,25% and variable Pmax 0,0822 W. Soaking ITO glass for 120 minutes produces chlorophyll a 22,32 mg/L, chlorophyll b 54,59 mg/L, total chlorophyll 74,91 mg/L , the Isc variable is 360 × 10^-3 A, the Voc variable is 191 × 10^-3 V, the Fiil Factor variable is 0,25% and the Pmax variable is 0,0172 W. This research proves that the optimal soaking time for ITO glass is 30 minutes, because the longer the ITO glass is soaked, the chlorophyll of papaya leaf extract will experience pigment degradation with a reduction in active chlorophyll molecules that absorb sunlight.

Implementasi Problem Based Learning untuk Meningkatkan Partisipasi Pembelajaran Bahasa Indonesia Siswa Kelas IX SMPN Model Terpadu Madani

Inka Nabila Friski Lahay, Sitti Harisah, Ridwan Wanusi — Tue, 31 Dec 2024 00:00:00 +0000

This study aims to analyze the effectiveness of implementing the Problem-Based Learning model in enhancing student participation in Bahasa Indonesia learning at SMP Negeri Model Terpadu Madani. The research method used is Classroom Action Research (CAR), which consists of four stages: planning, implementation, observation, and reflection. The subjects of the study were 30 ninth-grade students. Data were collected through observation and documentation, then analyzed using qualitative and quantitative descriptive techniques. The results showed that the implementation of the Problem-Based Learning model effectively increased student participation. In the first cycle, student participation reached 65%, while in the second cycle, it increased to 85%. Student participation improved significantly from the first to the second cycle, with no students categorized as low or very low in the second cycle. Therefore, it can be concluded that the application of the Problem-Based Learning model is proven to be effective in enhancing student participation in Bahasa Indonesia learning.

Jurnal Kreatif Online

Analisis Performa DSSC dengan Ekstrak Daun Pepaya terhadap Lama Perendaman Kaca ITO (Kajian Teori)

Implementasi Problem Based Learning untuk Meningkatkan Partisipasi Pembelajaran Bahasa Indonesia Siswa Kelas IX SMPN Model Terpadu Madani