A High-Resolution Thin-Film Fingerprint Sensor Using a Printed Organic Photodetector

被引：59

作者：

Tordera, Daniel ^{[1
]}

Peeters, Bart ^{[1
]}

Akkerma, Hylke B. ^{[1
]}

van Breemen, Albert J. J. M. ^{[1
]}

Maas, Joris ^{[1
]}

Shanmugam, Santhosh ^{[1
]}

Kronemeijer, Auke J. ^{[1
]}

Gelinck, Gerwin H. ^{[1
,2
]}

机构：

[1] Hoist Ctr, High Tech Campus 31, NL-5656 AE Eindhoven, Netherlands

[2] Eindhoven Univ Technol, Dept Appl Phys, NL-5600 MB Eindhoven, Netherlands

来源：

ADVANCED MATERIALS TECHNOLOGIES | 2019年 / 4卷 / 11期

关键词：

biometric sensor; bulk heterojunction; fingerprint sensor; organic photodetector; organic photodiode; ENCAPSULATION; PHOTODIODES;

D O I：

10.1002/admt.201900651

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

Organic photodetectors (OPDs) have attracted much attention in recent years, due to their promise in large-area light sensing applications. Here, high-resolution slot-die-coated large-area bulk heterojunction organic photodiode (OPD) arrays are reported. The OPD uses a novel electron transport layer, indium gallium zinc oxide in combination with a molybdenum oxide top-electrode. Together, these effectively reduce dark current densities to very low levels of approximate to 10(-7) mA cm(-2) at -2 V. The OPDs show linear behavior in a wide range of light intensities and high detectivity values under reverse bias conditions. When coated on a 508 ppi TFT backplane, a high-quality optical fingerprint scanner capable of imaging in reflection is realized. The optical and electrical properties of the fingerprint sensor are characterized and high-resolution fingerprint images are obtained.

引用

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