Ambient Light Organic Sensor in a Printed Complementary Organic TFT Technology on Flexible Plastic Foil

Author

Maiellaro, G. ; Ragonese, Egidio ; Gwoziecki, R. ; Jacobs, Steven ; Marjanovic, Nenad ; Chrapa, Marek ; Schleuniger, Jurg ; Palmisano, G.

Author_Institution

DIEEI, Univ. di Catania, Catania, Italy

Volume

61

Issue

4

fYear

2014

fDate

Apr-14

Firstpage

1036

Lastpage

1043

Abstract

This paper presents an organic sensor for ambient light monitoring fabricated on flexible plastic foil. The sensor exploits an organic photodiode whose photocurrent is linearly converted into an output voltage by a transconductance operational amplifier in a feedback configuration. The photodiode is based on an inkjet printed bulk heterojunction blend of P3HT/PCBM sandwiched between Au and Al electrodes, whereas the amplifier is implemented in a printed complementary organic TFT technology. Both the photodiode and the amplifier were fully characterized in stand-alone configuration. Then, the response of the assembled sensor was measured by using a commercial 12-V halogen lamp as light source. Experimental data demonstrated that the sensor is able to provide a linear detection of the incident light intensity up to 11000 lux.

Keywords

flexible electronics; ink jet printing; operational amplifiers; optical sensors; photoconductivity; photodiodes; polymer blends; thin film transistors; Al; Au; P3HT-PCBM blend; ambient light organic sensor; feedback configuration; flexible plastic foil; halogen lamp source; inkjet printed bulk heterojunction; organic photodiode; photocurrent; printed complementary organic TFT technology; stand-alone configuration; transconductance operational amplifier; voltage 12 V; Current measurement; Photodiodes; Printing; Substrates; Thin film transistors; Voltage measurement; Current-to-voltage (${rm I}$/${rm V}$) converter; foil bonding; organic circuits; pentacene; photodiode (OPD); thin film transistor (TFT); transconductance operational amplifier (OTA);

fLanguage

English

Journal_Title

Circuits and Systems I: Regular Papers, IEEE Transactions on

Publisher

ieee

ISSN

1549-8328

Type

jour

DOI

10.1109/TCSI.2013.2286031

Filename

6650015