The top down design flow of a-Si:H photodiodes with multivariate methods of analysis

Christian Merfort; Andreas Bablich; Oliver Schwaneberg; Krystian Watty; Markus Böhm

doi:10.1117/12.897374

5 October 2011 The top down design flow of a-Si:H photodiodes with multivariate methods of analysis

Christian Merfort, Andreas Bablich, Oliver Schwaneberg, Krystian Watty, Markus Böhm

Proceedings Volume 8186, Electro-Optical Remote Sensing, Photonic Technologies, and Applications V; 81860N (2011) https://doi.org/10.1117/12.897374
Event: SPIE Security + Defence, 2011, Prague, Czech Republic

Abstract

A fast and reliable detection of potentially dangerous substances has become very important in ensuring civilian security. Currently, modern security systems have proven to be more effective on the basis that objects should be properly characterized and identified. For instance, chemical tests are used to identify samples of whitish powder that is suspected to be dangerous or illegal. Although these chemical tests are conducted very quickly, they are relatively expensive. However, well established methods of optical characterization offer a suitable alternative. The demand for low-cost and disposable devices have escalated the development of intelligent photodiodes, especially of tunable a-Si:H multispectral photodiodes¹. Our aim of reengineering is to develop the best match for the spectral response adjustment. Unfortunately, it is not sufficient to optimize the spectral response only. The top down design flow begins with the calculation of the photocurrent for different combinations of light sources, spectral responses and whitish powder samples to build up a multivariate data set. The optimum combination is found at the point of intersection in the factor values in a 2-D scattergram. It is therefore, required that the use optimized photodiodes would simplify and accelerate the identification of potentially dangerous substances.

Citation Download Citation

Christian Merfort, Andreas Bablich, Oliver Schwaneberg, Krystian Watty, and Markus Böhm "The top down design flow of a-Si:H photodiodes with multivariate methods of analysis", Proc. SPIE 8186, Electro-Optical Remote Sensing, Photonic Technologies, and Applications V, 81860N (5 October 2011); https://doi.org/10.1117/12.897374

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available