Objective
Silicon photodiodes have replaced other types of photodetectors such as photocells in a wide range of optical radiation measurements. They possess many qualities which make them ideally suited for many applications (high quantum efficiency over a wide range of wavelength from 200 nm to over 1000 nm), uniform response over their sensitive area and very good linearity.
For accurate work there remain difficulties regarding stability. As the demand for calibration of photodiodes as transfer standards is increasing considerably, it was the objective of this project to share the work of evaluating in well-defined conditions the stability of a number of the best photodiodes from various manufacturers.
RESULTS
Devices manufactured by 5 different companies (Centronic, UK, model OSD100-S-AEG, D, model BPW35 - UDT, USA, model PIN-10DP/SB-EG & G, USA model UV444BQ-Hamamatsu, Japan, model S1227-101OBQ) have been tested over a period of five years. All these photodiodes met the following criteria:
- photovoltaic (unbiased) type
- spectral response ranging from 200 to 1000 nm
- commercial availability with active area of 100 mm{2}
The data base consisted of 4000 results, obtained by the 4 participating laboratories testing 100 devices, 10 times each. The Centronic and Hamamatsu devices have been identified as extremely stable (change in response 1%), and well suited to act as transfer standards.
Fields of science (EuroSciVoc)
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
CORDIS classifies projects with EuroSciVoc, a multilingual taxonomy of fields of science, through a semi-automatic process based on NLP techniques. See: The European Science Vocabulary.
- engineering and technology electrical engineering, electronic engineering, information engineering electronic engineering sensors optical sensors
- natural sciences chemical sciences inorganic chemistry metalloids
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Programme(s)
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Multi-annual funding programmes that define the EU’s priorities for research and innovation.
Topic(s)
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Calls for proposals are divided into topics. A topic defines a specific subject or area for which applicants can submit proposals. The description of a topic comprises its specific scope and the expected impact of the funded project.
Call for proposal
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Procedure for inviting applicants to submit project proposals, with the aim of receiving EU funding.
Funding Scheme
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Funding scheme (or “Type of Action”) inside a programme with common features. It specifies: the scope of what is funded; the reimbursement rate; specific evaluation criteria to qualify for funding; and the use of simplified forms of costs like lump sums.
Coordinator
France
The total costs incurred by this organisation to participate in the project, including direct and indirect costs. This amount is a subset of the overall project budget.