Extraction of electronic parameters of organic diode fabricated with NIR absorbing functional manganase phthalocyanine organic semiconductor

• Published in: Synthetic metals Vol. 161; no. 15; pp. 1477 - 1482
• Main Authors: Günsel, Armağan, Kandaz, Mehmet, Yakuphanoglu, Fahrettin, Farooq, W.A.
• Format: Journal Article
• Language: English
• Published: Amsterdam Elsevier B.V 01-08-2011; Elsevier
• Subjects: Absorbing; Absorption; Aluminum; Applied sciences; Diodes; Electronics; Energy gap; Exact sciences and technology; Interfacial state density; Manganase phthalocyanine; Optical properties; Organic diode; Organic semiconductor; Organic semiconductors; Resistivity; Semiconductor electronics. Microelectronics. Optoelectronics. Solid state devices; Organic diode; Manganase phthalocyanine; Organic semiconductor; Interfacial state density; Rectifier effect; Interface state; Density of states; Electrical conductivity; Voltage current curve; Diode; Trap; Indium oxide; Parameter extraction; Ideality; Phthalocyanine; Energy gap; Tin addition; Electronic component; Optical characteristic; Organic semiconductors; Series resistance; Time constant; Optical absorption
• ISSN: 0379-6779; 1879-3290
• DOI: 10.1016/j.synthmet.2011.04.006

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► The peripheral α-substituted-functional manganase phthalocyanine is an organic semiconductor with optical band gap of 2.98
eV. ► The ITO/MnPc/Al diode shows a rectifying behavior due to the formation of MnPc/Al interface with a rectification ratio of 29.4 at ±2
V. ► The MnPc organic semiconductor can be used in electronic device applications as an organic diode.
The semiconducting and metal/organic semiconductor properties of the newly synthesized NIR absorbing α-substituted manganase phthalocyanine bearing functional 2,3-dihydroxypropylthio moieties {M[Pc(S–CH
3CH
2(OH)CH
2(OH))]
4X}(M
=
Mn
III) have been investigated by electrical conductivity–temperature, optical absorption and current–voltage characteristics methods. The electrical conductivity increases with the temperature, suggesting that the peripheral α-substituted-functional manganase phthalocyanine is an organic semiconductor. The optical band gap and trap energy values were determined and were found to be 2.98
eV and 1.95
eV, respectively. The ITO/MnPc/Al diode shows a rectifying behavior due to the formation of MnPc/Al interface with a rectification ratio of 29.4 at ±2
V. The series resistance
R
s
and ideality factor
n values were found to be 102.6
kΩ and 8.89, respectively. The interface state density for the diode was of order of 2.73
×
10
11
eV
−1
cm
−2 with the interface time constant of 1.93
×
10
−5.
It is evaluated that newly synthesized α-substituted manganase phthalocyanine bearing functional 2,3-dihydroxypropylthio moieties is an organic semiconductor and can be used in electronic device applications as an organic diode.