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Lensa : Jurnal Kependidikan Fisika
Published by IKIP Mataram
ISSN : 23384417     EISSN : 23384417     DOI : -
Core Subject : Science, Education,
Education Physics
Lensa: Jurnal Kependidikan Fisika (J-LKF) published by the Physics Education Study Program Faculty of Mathematics and Natural Sciences (FPMIPA) IKIP Mataram. Contains scientific articles in the form of research and literature. Published every 6 months, including a study of science and teaching in the field of Physics in Indonesian and English.
Arjuna Subject : Ilmu Sosial - Pendidikan
Articles 4 Documents
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Search results for , issue "Vol 8, No 1: June 2020 (in Press)" : 4 Documents clear
SYNTHESIS AND CHARACTERIZATION OF TIO2 SEMICONDUCTOR DOPED BY AGNO3 AND THEIR APPLICATION AS PHOTOANODE IN DYE-SENSITIZED SOLAR CELLS Ali Umar, Marjoni Imamora; Faizil, Nanda; Umar, Akrajas Ali; Saad, Siti Khatijah Md
Lensa: Jurnal Kependidikan Fisika Vol 8, No 1: June 2020 (in Press)
Publisher : IKIP Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/j-lkf.v8i1.2728

Abstract

The use of Titanium dioxide (TiO2) semiconductors in Dye-Sensitized Solar Cells (DSSC) devices have been extensively studied and synthesized with various techniques to obtain optimal performance. The TiO2 semiconductors with optimal performance are influenced by the growth method, the time of growth, the shape of the microstructure, and the optical properties. In this study, it was reported about the effect of silver nanoparticles (AgNO3) doping onto TiO2 semiconductors on their microstructure, reflectance, and efficiency of the DSSC device. The synthesis of TiO2 was carried out using liquid phase deposition (LPD) and immersed into an AgNO3 solution with a variation of time namely 0.5 h, 1 h, 2 h, 4 h, and 6 h. The entire TiO2 + AgNO3 sample, then used as a photoanode on DSSC with plastisol as a counter electrode. Characterization of microstructure, reflectance, and DSSC performance was carried out by using field emission scanning electron microscopy (FESEM), Uv-Vis Spectrophotometer, and Gamry Instrument, respectively. The FESEM results show that AgNO3 has successfully grown on the ITO substrate in a spherical shape with an average particle diameter ranging from 1.52-2.29 ?m. From observations using the Uv-Vis Spectrophotometer, obtained the energy band gap values ranged from 0.22 to 2.27 eV. The best results of DSSC device efficiency, with TiO2+AgNO3/Dye/Plastisol structure, have resulted in the Voc of 0.694 V, current density (Jsc) of 0,943 mA/cm2and fill factor (FF) of 43,50% which is obtained at sample 1.
ANALYSIS OF THE ABILITY OF JUNIOR HIGH SCHOOL STUDENTS TO SOLVE THE PHYSICS PROBLEMS IN VARIOUS FORMS OF PROBLEM REPRESENTATIONS Sutirta, I Wayan Gede; Muslimin, Muslimin; Pasaribu, Marungkil
Lensa: Jurnal Kependidikan Fisika Vol 8, No 1: June 2020 (in Press)
Publisher : IKIP Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/j-lkf.v8i1.2682

Abstract

This research is a descriptive study with a qualitative approach, which aims to describe the ability of junior high school students to solve physics problems in various forms of problem representation. The subjects in this study were the IX grade junior high school students in six Palu city schools. Respondents for interviews in the study amounted to 4 people for each form of problem representation, with the criteria of students who answered right, students who answered ± 50% correct, students who answered incorrectly, and who did not answer. The instrument used was a test of problem solving skills and interviews. The data obtained were analyzed qualitatively including data reduction, presenting data and verification while descriptive analysis was performed by calculating the total score, calculating the percentage and categorizing problem solving abilities. The results obtained by the average ability of junior high school students to solve physics problems in various forms of problem representation 21.86% (less category), with the percentage of each form of representation ie verbal representation 36.09% (less category), image/picture representation 23.78% (less category), diagram representation 19.47% (poor category) and graphic representation 8.10% (poor category).
LEARNING TOOLS WITH INQUIRY MODELS INTEGRATED OF CHARACTER EDUCATION Azmi, Irham; Jufri, A. Wahab; Makhrus, Muh.
Lensa: Jurnal Kependidikan Fisika Vol 8, No 1: June 2020 (in Press)
Publisher : IKIP Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/j-lkf.v8i1.2750

Abstract

This study aimed to describe the characteristics and validity of learning tools with inquiry models integrated of character education that is used in learning at junior high school level. The intended learning tools include syllabus, lesson plans, teaching materials, student worksheets, and scientific creativity test instruments. This research is an evaluative descriptive study that describes the characteristics and evaluates the quality of the validity of learning tools. The learning tools validation process involves three validators who validate the learning tools on aspects of content validity and construct validity. The validation results show that the validator's assessment of the learning framework developed in the aspects of content validity and construct validity are categorized as very valid with an average range of scores of ?85%, with a percentage of agreement ?75%. The results of this study can be used as a foundation that the learning tools with inquiry models integrated of character education can be implemented in the field.
THE EFFECT OF PROCESS ORIENTED GUIDED INQUIRY LEARNING (POGIL) MODEL ON STUDENTS' CONCEPTS MASTERY Pradiyanasari, Ni Wayan Erisca; Verawati, Ni Nyoman Sri Putu; Doyan, Aris
Lensa: Jurnal Kependidikan Fisika Vol 8, No 1: June 2020 (in Press)
Publisher : IKIP Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33394/j-lkf.v8i1.2776

Abstract

This study aims to determine the effect of the Process Oriented Guided Inquiry Learning (POGIL) model on the students? concept mastery in SMAN 6 Mataram, subject matter of harmonious vibration. This study is a quasi-experimental research with a pretest-posttest control group design. The population was all students of class X MIA at SMAN 6 Mataram in the 2018/2019 academic year totaling 172 students, with purposive sampling technique obtained by class X MIA 1 as an experimental class and class X MIA 3 as a control class. The concept mastery test instrument uses multiple choice questions totaling 25 items. The concept mastery data obtained were analyzed using t-test with a significance level (?) of 5%. Hypothesis test results indicate that the t-count is greater than t-table, that is 2.482 is greater than 2.020, so that H0 is rejected and Ha is accepted. Thus, there is an effect of the Process Oriented Guided Inquiry Learning (POGIL) model on students' concept mastery.

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