PENDAMPINGAN PEMBUATAN PACKAGING STANDAR EKSPOR BAGI KELOMPOK WANITA TANI NGUDI SARI, KELURAHAN KEMIRI, KECAMATAN TANJUNGSARI, KABUPATEN GUNUNGKIDUL

Kelompok Wanita Tani Ngudi Sari merupakan salah satu kelompok penggiat UMKM yang terletak di Kelurahan Kemiri Kecamatan Tanjungsari Kabupaten Gunungkidul. KWT Ngudi Sari mengolah dan memproduksi beberapa produk setengah jadi dan produk olahan ubi kayu atau singkong. Mereka telah mempromosikan produk mereka, baik secara langsung maupun online, melalui platform seperti Shopee, Facebook, dan Tokopedia. Untuk pangsa pasar luar negeri atau internasional mereka pernah mengirimkan ke beberapa konsumen atas permintaan pribadi. Dapat dikatakan bahwa produk mereka belum dapat menjangkau pasar internasional. Salah satu alasannya adalah standar pengemasan atau packaging yang masih belum sesuai dengan standar ekspor. Perlu adanya dorongan agar KWT Ngudi Sari agar dapat membuat packaging standar ekspor. Dengan harapan KWT Ngudi Sari dapat meningkatkan kualitas packaging-nya sehingga dapat menjangkau pasar internasional

Low carrier recombination in polysiloxane gel electrolyte for high-performance DSSC

Previous research on quasi-solid-state DSSC (QSS-DSSC) that utilized polysiloxane-based polymer gel electrolytes (PGE) showed that the functional performance of the cells was highly affected by electrolyte infiltration into the TiO _2 nano-porous layers. This study evaluated the efficiency enhancement in siloxane-based cells by introducing a TiCl _4 pre-treatment process twice. We compared the impedance spectrum of PGE-based DSSC without (type-1 PGE) and with (type-2 PGE) with the addition of propylene carbonate, measured under dark and light illumination. The impedance spectra of both cells showed different characteristics at different condition measurements, especially in the high-frequency region. Unlike the type-2 PGE-based DSSC, the type-1 PGE-based DSSC did not show the transmission line characteristic, which indicated less charge carrier diffusion inside the TiO _2 nano-porous layer. Under light illumination, the interfacial charge transfer between electrons inside TiO _2 layers with the electrolyte (R _ct ), and the electron lifetime inside TiO _2 layers before it is recombined ( τ _r ), became smaller for type-2 PGE-based DSSC and larger for type-1 PGE-based DSSC. This indicated that the recombination rate increased as the PGE became more vicious. This result supports the photovoltaic characteristics that yield current density and efficiency values of 16 mA cm ^−2 and 5.37% for type-2 PGE-based DSSC, 13.4 mA cm ^−2 , and 4.72% for type-1 PGE-based DSSC. The challenge for further improvement in DSSC that employs PGE is to elevate the wetting capability of the gel inside the TiO _2 layer without additional solvent since additional solvent eventually can reduce ionic concentration and consequently increase the R _ct value as shown in the analysis of the impedance spectrum of TiO _2 layer without dye

General working principles of CH3NH3PbX3 perovskite solar cells

ABSTRACT: Organometal halide perovskite-based solar cells have recently realized large conversion efficiency over 15% showing great promise for a new large scale cost-competitive photovoltaic technology. Using impedance spectroscopy measurements we are able to separate the physical parameters of carrier transport and recombination in working devices of the two principal morphologies and compositions of perov-skite solar cells, viz. compact thin films of CH3NH3PbI3−xClx and CH3NH3PbI3 infiltrated on nanostructured TiO2. The results show nearly identical spectral characteristics indicating a unique photovoltaic operating mechanism that provides long diffusion lengths (1 μm). Carrier conductivity in both devices is closely matched, so that the most significant differences in performance are attributed to recombination rates. These results highlight the central role of the CH3NH3PbX3 semiconductor absorber in carrier collection and provide a new tool for improved optimization of perovskite solar cells. We report for the first time a measurement of the diffusion length in a nanostructured perovskite solar cell

General Working Principles of CH₃NH₃PbX₃ Perovskite Solar Cells

Organometal halide perovskite-based solar cells have recently realized large conversion efficiency over 15% showing great promise for a new large scale cost-competitive photovoltaic technology. Using impedance spectroscopy measurements we are able to separate the physical parameters of carrier transport and recombination in working devices of the two principal morphologies and compositions of perovskite solar cells, viz. compact thin films of CH₃NH₃PbI_3–<i>x</i>Cl_<i>x</i> and CH₃NH₃PbI₃ infiltrated on nanostructured TiO₂. The results show nearly identical spectral characteristics indicating a unique photovoltaic operating mechanism that provides long diffusion lengths (1 μm). Carrier conductivity in both devices is closely matched, so that the most significant differences in performance are attributed to recombination rates. These results highlight the central role of the CH₃NH₃PbX₃ semiconductor absorber in carrier collection and provide a new tool for improved optimization of perovskite solar cells. We report for the first time a measurement of the diffusion length in a nanostructured perovskite solar cell