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Volume 72 (2009)
- Issue 6 Pages 379-
- Issue 5 Pages 329-
- Issue 4 Pages 237-
- Issue 3 Pages 157-
- Issue 2 Pages 55-
- Issue 1 Pages 3-
Volume 72, Issue 5
Displaying 1-5 of 5 articles from this issue
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Special Topics: Science Related to Durability of Organic Devices
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Katsumi Tokumaru2009 Volume 72 Issue 5 Pages 329-336
Published: 2009
Released on J-STAGE: October 25, 2011
JOURNAL FREE ACCESSTo get insight into the mechanisms for the operational fatigue of light-related organic devices such as organic light emitting diodes, organic solar cells and electrophotography, possible mechanisms for degradation of organic materials are argued for some examples.
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Masahiro Hiramoto2009 Volume 72 Issue 5 Pages 337-343
Published: 2009
Released on J-STAGE: October 25, 2011
JOURNAL FREE ACCESSFundamental principles and p-i-n junction concept of organic solar cells are described. Methods for improvement of conversion efficiency such as nanostructure design of co-deposited i-layer, high-purification of organic semiconductors, and utilization of near infrared light by J-aggregate of phthalocyanine are explained. Conversion efficiency exceeding 5% was observed.
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Hideyuki Murata, Toshinori Matsushima2009 Volume 72 Issue 5 Pages 344-349
Published: 2009
Released on J-STAGE: October 25, 2011
JOURNAL FREE ACCESSWe demonstrated a marked improvement in performance of organic light-emitting diodes (OLEDs) by interfacial engineering at electrode/organic and organic/organic heterojunction interfaces. The use of an ultrathin 0.75-nm-thick MoO3 layer between indium tin oxide (ITO) and N,N'-diphenyl-N,N'-bis(1-naphthyl)-1,1'-biphenyl-4,4'-diamine (α-NPD) drastically decreased the driving voltage of OLEDs and prevented OLED degradation at an ITO/α-NPD interface. We presented that the insertion of a thin 5-nm-thick mixed layer of α-NPD and tris(8-hydroxyquinoline) aluminum (Alq3) reduced the driving voltage and enhanced the OLED stability as well. The decrease in driving voltage may reduce the probability of the generation of Joule heat and improve the stability of OLED.View full abstractDownload PDF (623K) -
Yousuke Miyashita2009 Volume 72 Issue 5 Pages 350-359
Published: 2009
Released on J-STAGE: October 25, 2011
JOURNAL FREE ACCESSOrganic dyes and pigments have been widely used as functional materials for silver halide photographic systems, ink-jet prints, and optical disks. For such applications, high lightfastness and good thermal properties are essential, but to date there have only been a small number of studies of these characteristics. In this paper we report our results concerning excited-states and lightfastness of these materials elucidated by a combination of several time-resolved spectroscopic measurements.
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Lecture
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Masafumi Inuiya2009 Volume 72 Issue 5 Pages 360-365
Published: 2009
Released on J-STAGE: October 25, 2011
JOURNAL FREE ACCESSDigital still camera is the electronic still camera that records the taken image data in the storage media digitally. But besides the photographic film was replaced to CCD only, the digital still camera is made with the complex technologies of the conventional camera technology (lens, AE, AF, etc.), the CCD image capturing technology, the digital signal processing technology and system control technology.
In these technologies, I'll mainly explain about a single plate color image capturing method and the signal processing technology in this issue, and the color reproduction and the file format for a digital still camera in the next issue.View full abstractDownload PDF (1152K)
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