While perovskite solar cells (PSCs) have emerged as promising low-cost solar power generators, most reported high-performance PSCs employ electron transport layers (ETLs, mainly TiO2) treated at high temperatures (≥450 °C), which may eventually hinder the development of flexible PSCs. Meanwhile, the development of low-temperature processed PSCs (L-PSCs) possessing performance levels comparable to those of high-temperature processed PSCs has actively been reported. In this study, L-PSCs with improved long-term stability and negligible hysteresis were developed through the effective passivation of shallow and deep traps in organic–inorganic hybrid perovskite (OIHP) crystals and at the ETL/OIHP interface. L-PSCs with alkaline chloride modification achieved state-of-the-art performance among reported L-PSCs (power conversion efficiency (PCE) = 22.6%) with a long-term shelf life. The origin of long-term stability and the efficient passivation of deep traps was revealed by monitoring the trap-state distribution. Moreover, the high PCE of a large-area device (21.3%, 1.12 cm2) was also demonstrated, confirming the uniformity of the modification.

A newly developed nanopatterned broadband antireflective (AR) coating was fabricated on the front side of a glass/indium tin oxide/perovskite solar cell (PSC) by depositing a single interference layer onto a two-dimensional (2D)patterned moth-eye-like nanostructure. The optimized developed AR nanostructure was simulated in a finite-difference time domain analysis. To realize the simulated developed AR nanostructure, we controlled the SiO 2 moth-eye structure with various diameters and heights and a MgF 2 single layer with varying thicknesses by sequentially performing nanosphere lithography, reactive ion etching, and electronbeam evaporation. Optimization of the developed AR nanostructure, which has a 100 nm-thick MgF 2 film coated onto the SiO 2 moth-eye-like nanostructure (diameter 165 nm and height 400 nm), minimizes the reflection loss throughout the visible range. As a result, the short-circuit current density (J SC ) of the newly ARcoated PSC increases by 11.80%, while the open-circuit voltage (V OC ) remains nearly constant. Therefore, the power conversion efficiency of the newly developed AR-decorated PSC increases by 12.50%, from 18.21% for a control sample to 20.48% for the optimum AR-coated sample. These results indicate that the newly developed MgF 2 /SiO 2 AR nanostructure can provide an advanced platform technology that reduces the Fresnel loss and therefore increases the possibility of the commercialization of glass-based PSCs.

Pandemi Covid-19 yang terus menyebar dengan cepat telah menimbulkan krisis ekonomi. Masyarakat perlu memiliki skill tambahan yang dapat meningkatkan potensi wirausaha mandiri masyarakat. Kegiatan ini bertujuan untuk meningkatkan potensi wirausaha mandiri ibu-ibu PKK Desa Tangkil melalui pelatihan pembuatan sabun cuci tangan dan hand sanitizer dan memberikan penyuluhan penyimpanan masker yang benar serta pentingnya melaksanakan 3M (mencuci tangan, memakai masker, dan menjaga jarak) untuk  membatasi penularan Covid-19. Kegiatan ini dilakukan melalui tahap perencanaan, persiapan, pelaksanaan yang diawali dan diakhiri dengan survey, serta tahap evaluasi. Hasil kegiatan secara umum menunjukkan bahwa terjadi peningkatan kemampuan yang signifikan dalam pembuatan sabun cuci tangan dan hand sanitizer. Serta terjadi peningkatan kesadaran pentingnya penyimpanan masker dengan benar dan tetap  melaksanakan 3M (mencuci tangan, memakai masker, dan menjaga jarak) untuk  membatasi penularan Covid-19.

Thiazole derivative molecules with a low energy gap have been successfully designed using the DFT/TD-DFT calculation methods. The calculations were simulated by adding varied numbers of thiophenes (1, 2, 3, and 10) and electron donating molecules of –H, -NH2, -OCH3, and –COOH in the ethanol solvent. The best thiazole derivative was the molecule constructed using a long-conjugated bridge of 10-thiophenes, the carboxyl anchoring site, and an amine addition as the electron donating molecule with an energy gap of 1.66 eV and a strong UV-Vis absorption in the red light region (673.20 nm). These designed molecules are beneficial to be applied in the equator area such as Indonesia. Further, the profound effects of the thiophene bridge in terms of the structural and energy gaps, and the variation of electron-donating molecules affected the photonic properties have been demonstrated in this paper.