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Aerosol‐Jet‐Printed Donor‐Blocking Layer for Organic Photodiodes
Author(s) -
Seiberlich Mervin,
Strobel Noah,
RuizPreciado Luis Arturo,
Ruscello Marta,
Lemmer Uli,
HernandezSosa Gerardo
Publication year - 2021
Publication title -
advanced electronic materials
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 2.25
H-Index - 56
ISSN - 2199-160X
DOI - 10.1002/aelm.202000811
Subject(s) - materials science , photodiode , optoelectronics , layer (electronics) , fabrication , organic solar cell , active layer , deposition (geology) , nanotechnology , heterojunction , composite material , polymer , medicine , paleontology , alternative medicine , thin film transistor , pathology , sediment , biology
Organic photodiodes (OPDs) are optical sensors combining high performance, lightweight mechanical flexibility, and processability from solution. Their fabrication by industrial printing techniques opens a wide range of innovative applications for emerging fields in sensing and the Internet of Things. They typically consist of printed multilayers with functionalities to absorb light, to extract charges, or to reduce detection noise. However, the printing of such device architecture poses a challenge as the deposition of a material can lead to disruption of film morphology or intermixing of materials if its solvent interacts with the previously deposited layer. This work proposes a process to print multilayers from the same solvent system utilizing the aerosol‐jet technique. By fine adjustment of the aerosol properties through the tube temperature ( T Tube ), the drying time of poly(3‐hexylthiophene‐2,5‐diyl) (P3HT) printed layers is significantly reduced. This allows its deposition onto a P3HT‐based bulk‐heterojunction (BHJ) without negatively affecting its performance. The additional printed P3HT layer, spatially extends the donor region of the BHJ, providing ideal hole extraction and simultaneous noise reduction by the blocking of injected electrons. This donor blocking layer (DBL) yields a noise reduction of two orders of magnitude in OPDs operated under −2 V reverse bias.