Anomalous photovoltaic effect based on spontaneous polarization of ferroelectric liquid crystals
Project/Area Number |
24655132
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Research Category |
Grant-in-Aid for Challenging Exploratory Research
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Allocation Type | Single-year Grants |
Research Field |
Functional materials chemistry
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Research Institution | Kagawa University |
Principal Investigator |
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Project Period (FY) |
2012-04-01 – 2014-03-31
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Project Status |
Completed (Fiscal Year 2013)
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Budget Amount *help |
¥4,160,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥960,000)
Fiscal Year 2013: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2012: ¥2,470,000 (Direct Cost: ¥1,900,000、Indirect Cost: ¥570,000)
|
Keywords | 液晶 / 液晶性半導体 / 強誘電性液晶 / 異常光起電力効果 / オリゴシロキサン / キラルスメクティックC相 / ホール輸送 / 自発分極 / ポリシロキサン / オリゴチオフェン / 電荷輸送 |
Research Abstract |
Ferroelectric liquid-crystalline (LC) phenylterthiophene derivatives bearing a decenyl group, a disiloxane chain, and a tetracyclosiloxane ring has been synthesized. These compounds exhibit a chiral smectic C (SmC*) phase, where its spontaneous polarization exceeds 100 nCcm-2. The hole mobilities determined by a time-of-flight method were on the order of 1x10-4 cm2V-1s-1. The compound having decenyl group exhibits an anomalous photovoltaic effect in the SmC* phase. It should be noted that even the compound bearing a bulky cyclotetrasiloxane ring exhibit an enatiotropic SmC* phase. The compound bearing a decenyl chain exhibits anomalous photovoltaic effect in the SmC* phase. Under zer-bias, photocurrent in the reversed direction was generated when DC bias was aplied to the sample before light illumination. The polarity of the zero-bias photocurrent was changed by the sign of the DC bias before the illumination.
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Report
(3 results)
Research Products
(27 results)
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[Book] Handbook of Liquid Crystals, Vol. 7, Ed. by J. Goodby, P. J. Collings, T. Kato, C. Tschierske, H. Gleeson, P. Raynes2013
Author(s)
M. Funahashi, T. Yasuda, T. Kato, "Liquid Crystal Semiconductors: Oligothiophene and Related Materials
Total Pages
20
Publisher
Wiley-VCH
Related Report
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