TY - JOUR
T1 - Intensity sensitive organic photodiodes patterned by inkjet method
AU - Yang, Yu
AU - Nakamichi, Tokuma
AU - Yoshioka, Hiroaki
AU - Omi, Soichiro
AU - Goto, Ryo
AU - Watanabe, Hirofumi
AU - Oki, Yuji
N1 - Funding Information:
This study was supported by the Industrial Technology Research Grant Program in 2007 of the New Energy and Industrial technology Development Organization (NEDO).
PY - 2011
Y1 - 2011
N2 - In this work, intensity sensitive organic photodiodes were made based on the drop-on-demand piezoelectric inkjet printing of poly(3-hexylthiophene) (P3HT) and phenyl-C61-butyric acid methyl ester (PCBM) blend on the ITO substrates. Inkjet conditions for printing the P3HT:PCBM/chlorobenzene solution were studied and the influences of concentration and inkjet parameters such as pulse voltage and the method of stacking spots were systematically investigated under the goal of optimizing the morphology and uniformity of P3HT:PCBM spots on various kinds of ITO substrates. P3HT:PCBM films in any shape and size were prepared by overlapping the neighboring spots and bulk heterojunctions were fabricated after the deposition of a thin Al film as cathode on their top. Under the excitation of a 532nm pulse laser source, the open-circuit voltage (Voc) between the ITO and Al electrodes could be detected. Intensity sensitive photo-diodes were obtained with a quantum yield of ∼0.35% and the time constant was estimated to be ∼1.0 μs. Ways for further improvement on the performance of the photo-diodes were also suggested.
AB - In this work, intensity sensitive organic photodiodes were made based on the drop-on-demand piezoelectric inkjet printing of poly(3-hexylthiophene) (P3HT) and phenyl-C61-butyric acid methyl ester (PCBM) blend on the ITO substrates. Inkjet conditions for printing the P3HT:PCBM/chlorobenzene solution were studied and the influences of concentration and inkjet parameters such as pulse voltage and the method of stacking spots were systematically investigated under the goal of optimizing the morphology and uniformity of P3HT:PCBM spots on various kinds of ITO substrates. P3HT:PCBM films in any shape and size were prepared by overlapping the neighboring spots and bulk heterojunctions were fabricated after the deposition of a thin Al film as cathode on their top. Under the excitation of a 532nm pulse laser source, the open-circuit voltage (Voc) between the ITO and Al electrodes could be detected. Intensity sensitive photo-diodes were obtained with a quantum yield of ∼0.35% and the time constant was estimated to be ∼1.0 μs. Ways for further improvement on the performance of the photo-diodes were also suggested.
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U2 - 10.1080/15421406.2011.563689
DO - 10.1080/15421406.2011.563689
M3 - Article
AN - SCOPUS:79957616662
SN - 1542-1406
VL - 538
SP - 136
EP - 142
JO - Molecular Crystals and Liquid Crystals
JF - Molecular Crystals and Liquid Crystals
ER -