Simply equipped ε-Ga2O3 film/ZnO nanoparticle heterojunction for self-powered deep UV sensor

In this paper, a ε-Ga2O3 film/ZnO nanoparticle hybrid heterojunction deep ultraviolet (UV) photodetector is described for 254 nm wavelength sensing application. The constructed ε-Ga2O3/ZnO heterojunction photodetector can operate in dual modes which are power supply mode and self-powered mode. Under reverse 5 V bias with 254 nm light intensity of 500 μW/cm2, the photoresponsivity, specific detectivity and external quantum efficiency are 59.7 mA/W, 7.83×1012 Jones and 29.2%. At zero bias, the advanced ε-Ga2O3/ZnO photodetector performs decent self-powered photoelectrical properties with photo-to-dark current ratio of 1.28×105, on/off switching ratio of 3.22×104, rise/decay times of 523.1/31.7 ms, responsivity of 4.12 mA/W and detectivity of 2.24×1012 Jones. The prominent photodetection performance lays a solid foundation for ε-Ga2O3/ZnO heterojunction in deep UV sensor application.

A Study on the Characteristics of Perovskite/ZnO-Based Ultraviolet Sensors

In this study, a UVC sensor was implemented using CH3NH3PbI3, a perovskite material. The UV sensor made with a p–i–n structure uses PEDOT:PSS as the p-type material and ZnO as the n-type material. The fabricated device shows a responsivity of 1.60 mA/W and a detectivity of 2.25×1010 Jones under 254 nm illumination with a power density of 1.02 mW/cm2 at 2 V. In addition, the manufactured UV sensor is a self-powered perovskite-based UV sensor that can operate without external bias. Therefore, this UVC sensor can have applications in various fields.

Interaction of a photochromic UV sensor protein Rc-PYP with PYP-binding protein

Photoactive yellow protein (PYP) from Halorhodospira halophila is one of typical light sensor proteins. Although its photoreaction has been extensively studied, no downstream partner protein has been identified to date. In this study, the intermolecular interaction dynamics observed between PYP from Rhodobacter capsulatus (Rc-PYP) and a possible downstream protein, PYP-binding protein (PBP), were studied. It was found that UV light-induced a long-lived product (pUV*), which interacts with PBP to form a stable hetero-hexamer (Complex-Ⅱ). The reaction scheme for this interaction was revealed using transient absorption and transient grating methods. Time-resolved diffusion detection showed that a hetero-trimer (Complex-Ⅰ) is formed transiently, which produced Complex-II via a second-order reaction. Any other intermediates, including those from pBL do not interact with PBP. The reaction scheme and kinetics are determined. Interestingly, long-lived Complex-II dissociates upon excitation with blue light. These results demonstrate that Rc-PYP is a photochromic and new type of UV sensor, of which signaling process is similar to that of other light sensor proteins in the visible light region. The photochromic heterogeneous intermolecular interactions formed between PYP and PBP can be used as a novel and useful tool in optogenetics.

Color-Coded Map Overlay Augmentation for Unmanned Vehicle Sensor Management

Four color-coded overlays that augment a tactical map were evaluated as candidates for multi-unmanned vehicle (UV) sensor management by a single operator. Each overlay provided six levels of temporal information to indicate how long ago each map location had been viewed by a UV. Twelve participants completed 140 trials, each trial posing a question to be answered by retrieving spatial-temporal information from static map overlays. The accuracy of the participants’ answers significantly differed as a function of overlay type. Suggestions for overlay design and future research methodology are provided.

Application of Arduino Programming Using ML8511 UV Sensor Hookup Guide to Learning the Effect of Ultraviolet’s Level

This paper learn programming of an Arduino. This also explores on how it can be used as a tool for study and research works. Learn how to program with Arduino, connect the project board to software on your computer, create sensor with the decision making and memory storing abilities of the Arduino. The ML8511 UV sensor outputs an analog signal in relation to the amount of UV light it detects and the effect to human body if get UV light in levels. The result are from three different locations, such as two outdoor and indoor start from 6.30 a.m until 10.45 a.m. Data shows that in outdoor during early morning or late afternoon hours the sun's rays pass at a greater angle through the atmosphere. Much more UV radiation is absorbed and less reaches the Earth, on the contrary in indoor UV index was 0. UV levels are highest under cloudless skies, and cloud cover generally reduces a person's exposure. However, light or thin clouds have little effect and may even enhance UV levels because of scattering. Don't be fooled by an overcast day or a cool breeze! Even a long stay in open shade, for example between buildings, may give a sensitive person a sunburn on a day with high UV levels. Therefore, it is important to know effect of ultraviolet’s level, from application of Arduino Programming using ML8511 UV sensor simplify the research.Keywords: Sensor UV; ML8511; Arduino; UV lights; Software.

Solar Tracker Elektro-Pneumatik Berbasis Kendali Fuzzy

ABSTRAKSalah satu faktor yang mempengaruhi daya keluaran listrik dari panel surya adalah posisi dan tingkat penyerapan sinar UV (Ultraviolet) dari matahari. Penggunaan aktuator motor servo untuk solar tracker membebani listrik yang dihasilkan dari pembangkit internal panel surya. Pada penelitian ini dirancang solar tracker menggunakan silinder pneumatik sebagai pengganti aktuator motor servo. Sedangkan, sensor UV digunakan untuk memantau sudut pergerakan matahari. Nilai error dan Δerror dari hasil pengolahan data sensor UV menjadi masukan bagi sistem pengambilan keputusan berbasis kendali fuzzy. Keluaran sistem pengambilan keputusan ini mengatur pergerakan posisi silinder pneumatik naik, turun, atau stop. Pengujian perangkat bekerja dengan baik, menghasilkan respon dinamik overshoot 5,3 % dan error steady state 1,6 %.Kata kunci: ultraviolet, pneumatik, fuzzy, overshoot, errorABSTRACTOne of the factors that affect the electrical output power of solar panels is the position and the absorption level of UV (Ultraviolet) rays from the sun. The use of a servo motor actuator for solar trackers burdens the generated electricity from the solar panels internal generator. In this study, a solar tracker was designed using a pneumatic cylinder as a replacement for the servo motor actuator. While a UV sensor was used to monitor the angle of the sun’s movement. The error and Δerror values from UV sensor data processing results become an input for decision-making systems based on fuzzy control. The output of this decision-making system regulates the movement of the position of the pneumatic cylinder up, down, or stopping. The test device worked properly, resulting in a dynamic response overshoot of 5.3% and a steady-state error of 1.6%.Keywords: ultraviolet, pneumatic, fuzzy, overshoot, error