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P-N junction01:11

P-N junction

508
A p-n junction is formed when p-type and n-type semiconductor materials are joined together. At the interface of the p-n junction, holes from the p-side and electrons from the n-side begin to diffuse into the opposite sides due to the concentration gradient. This diffusion of carriers leads to a region around the junction where there are no free charge carriers, known as the depletion region. The charge density within the depletion region for the n-side and p-side can be described by the...
508

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Multi-Surface Adhesion Luminescent Solar Concentrators for Supply-Less IoT.

Gonçalo Figueiredo1,2, Sandra F H Correia3, Bruno P Falcão1

  • 1Department of Physics and CICECO - Aveiro Institute of Materials, University of Aveiro, Aveiro, 3810-193, Portugal.

Advanced Science (Weinheim, Baden-Wurttemberg, Germany)
|July 16, 2024
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Summary
This summary is machine-generated.

This study presents a self-powered temperature sensor for Internet of Things (IoT) devices using a novel luminescent solar concentrator. The device offers autonomous, real-time data transmission and reliable operation in various conditions.

Keywords:
Internet of Thingsbuilding‐integrated photovoltaicsluminescent solar concentratorsself‐adhesivetemperature sensors

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Area of Science:

  • Materials Science
  • Energy Harvesting
  • Sensor Technology

Background:

  • The proliferation of Internet of Things (IoT) devices necessitates sustainable power solutions for sensors and transmitters.
  • Energy harvesting is crucial for developing supply-less IoT devices, reducing reliance on external power sources.
  • Novel materials and device architectures are needed to improve the efficiency and reliability of energy harvesting systems.

Purpose of the Study:

  • To develop a self-powered temperature sensor for IoT applications.
  • To design a novel luminescent solar concentrator (LSC) integrated with a temperature sensor.
  • To demonstrate autonomous data transmission and reliable operation in diverse environmental conditions.

Main Methods:

  • Fabrication of a luminescent solar concentrator (LSC) using a lanthanide-doped styrene-ethylene-butylene-styrene elastomer.
  • Integration of the LSC with a temperature sensing element to create a supply-less device.
  • Characterization of device efficiency, thermal sensitivity, temperature uncertainty, and autonomous data transmission capabilities.

Main Results:

  • The developed LSC achieved a device efficiency of 0.09%.
  • The temperature sensor demonstrated a thermal sensitivity of 2.1%°C⁻¹ and a temperature uncertainty of 0.06°C.
  • The sensor autonomously transmitted real-time data and operated continuously for 24 hours, even in low-light conditions with LED integration.

Conclusions:

  • The novel luminescent solar concentrator-based temperature sensor offers a viable solution for self-powered IoT devices.
  • The system exhibits high robustness, reliability, and the capability for multiple thermometric parameter measurements.
  • This technology enables autonomous, real-time environmental monitoring, paving the way for widespread IoT adoption.