JPH0346421B2 - - Google Patents
Info
- Publication number
- JPH0346421B2 JPH0346421B2 JP58206313A JP20631383A JPH0346421B2 JP H0346421 B2 JPH0346421 B2 JP H0346421B2 JP 58206313 A JP58206313 A JP 58206313A JP 20631383 A JP20631383 A JP 20631383A JP H0346421 B2 JPH0346421 B2 JP H0346421B2
- Authority
- JP
- Japan
- Prior art keywords
- light
- present
- energy
- light conversion
- functional material
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J19/00—Chemical, physical or physico-chemical processes in general; Their relevant apparatus
- B01J19/08—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor
- B01J19/12—Processes employing the direct application of electric or wave energy, or particle radiation; Apparatus therefor employing electromagnetic waves
- B01J19/122—Incoherent waves
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
Landscapes
- Chemical & Material Sciences (AREA)
- Organic Chemistry (AREA)
- Health & Medical Sciences (AREA)
- General Health & Medical Sciences (AREA)
- Toxicology (AREA)
- Electromagnetism (AREA)
- Physics & Mathematics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Compositions Of Oxide Ceramics (AREA)
- Physical Or Chemical Processes And Apparatus (AREA)
- Catalysts (AREA)
- Investigating Or Analyzing Materials By The Use Of Fluid Adsorption Or Reactions (AREA)
- Photometry And Measurement Of Optical Pulse Characteristics (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、応答性がよく長時間にわたつて使用
可能な光変換機能材料に関するものである。さら
に詳しくいえば、本発明は、光を照射したとき
に、光エネルギーを他のエネルギー例えば電気エ
ネルギーに変換するための光変換機能材料に関す
るものである。DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a light conversion functional material that has good responsiveness and can be used for a long period of time. More specifically, the present invention relates to a light conversion functional material for converting light energy into other energy, such as electrical energy, when irradiated with light.
近年、太陽エネルギーを利用して他のエネルギ
ー例えば熱エネルギー、電気エネルギー、化学エ
ネルギーを得る技術が開発され、各分野において
実用化されつつある。そのような材料としてはケ
イ素のような単体結晶や酸化セシウムのような酸
化物が知られているが、変換効率のよい材料は、
高価な上に耐食性を欠き、長時間の使用に耐えな
いという欠点がある。他方、安価で耐食性の良好
な材料は、一般に高抵抗で、短波長の光吸収を行
うものであるため、光のエネルギー分布の低い波
長領域で使用しなければならず効率が低くなるの
も免れない。また、焼結体を主体としたものも知
られているが、これは応答性が低いという欠点が
ある。
In recent years, techniques for obtaining other energy such as thermal energy, electrical energy, and chemical energy using solar energy have been developed and are being put into practical use in various fields. Single crystals such as silicon and oxides such as cesium oxide are known as such materials, but materials with high conversion efficiency are
It is expensive, lacks corrosion resistance, and cannot withstand long-term use. On the other hand, materials that are inexpensive and have good corrosion resistance generally have high resistance and absorb light at short wavelengths, so they must be used in a wavelength range where the energy distribution of light is low, which avoids lower efficiency. do not have. In addition, a device mainly made of a sintered body is also known, but this has the drawback of low responsiveness.
本発明は、前記した欠点を克服し、応答性がよ
く、しかも長時間にわたつて使用しうる新規な光
変換機能材料を提供することを目的としてなされ
たものである。
The present invention has been made with the object of overcoming the above-mentioned drawbacks and providing a novel light conversion functional material that has good responsiveness and can be used for a long period of time.
本発明者らは、光変換機能をもつ材料について
種々研究を重ねた結果、α−Fe2O3を母材とし、
これにチタン及びスズの少なくとも１種の酸化物
を固溶させてｎ型の半導体を付与したものを焼結
させると応答性の良好な光変換機能材料が得られ
ることを見出し、この知見に基づいて本発明をな
すに至つた。
As a result of various research into materials with light conversion function, the present inventors have found that α-Fe 2 O 3 is used as a base material,
Based on this knowledge, it was discovered that a light conversion functional material with good responsiveness could be obtained by adding an n-type semiconductor to this by adding at least one oxide of titanium and tin as a solid solution, and sintering it. As a result, the present invention was completed.
すなわち、本発明は、α−Fe2O3母材にSnO2
及びTiO2の少なくとも１種を固溶させて焼結し
た半導体から成る光変換機能材料を提供するもの
である。 That is, in the present invention, SnO 2 is added to the α-Fe 2 O 3 base material.
The present invention provides a light conversion functional material made of a semiconductor sintered with at least one of TiO 2 and TiO 2 dissolved therein.
この半導体は、例えばα−Fe2O3母材に対し、
約５モル％程度の割合でチタン又はスズあるいは
その両方を配合し、常法に従つて焼結することに
よつて得られる。 This semiconductor is, for example, α-Fe 2 O 3 base material,
It is obtained by blending titanium and/or tin in a proportion of about 5 mol % and sintering according to a conventional method.
このようにして得られた焼結体は、光に対し良
好な応答性を示し、波長440〜500nmの範囲の光
をよく吸収する。また、光励起による抵抗変化が
著しく大きく、光強度16000ルクスにおけるバル
ク抵抗は14.9KΩ、120000ルクスのときのバルク
抵抗は11.9KΩである。 The sintered body thus obtained exhibits good responsiveness to light and absorbs well light in the wavelength range of 440 to 500 nm. In addition, the resistance change due to optical excitation is extremely large; the bulk resistance at a light intensity of 16,000 lux is 14.9 KΩ, and at 120,000 lux, the bulk resistance is 11.9 KΩ.
したがつて、光強度と抵抗値の変化を示す度合
γを式
γ＝logRA−logRB／logLA−logLB
（ただし、RA及びRBは光強度LA及びLBに対応す
る抵抗値である）
に従つて求めると約0.8となり、市販の光センサ
ーに用いられている材料に匹敵するものであるこ
とが分かる。 Therefore , the degree γ indicating the change in light intensity and resistance value is expressed as It is found that the value is approximately 0.8, which is comparable to the materials used in commercially available optical sensors.
また、この焼結体の表面をSnO2、In−Snの酸
化物（ITO）、Si3N4などの光吸収係数の大きい
簿膜でコーテイングすることによつて、変換効率
をさらに高めることができる。 Furthermore, the conversion efficiency can be further increased by coating the surface of this sintered body with a film with a high light absorption coefficient such as SnO 2 , In-Sn oxide (ITO), or Si 3 N 4 . can.
本発明の光変換機能材料は、可視光の550nm以
下の波長を吸収することが可能であるので自然光
を利用する場合、太陽エネルギー分布と照合する
と非常に有利な条件を備えている。
The light conversion functional material of the present invention is capable of absorbing visible light with a wavelength of 550 nm or less, so when natural light is used, it has extremely advantageous conditions when compared with solar energy distribution.
しかも、このものは、高焼結度において、抵抗
が小さく、高い導電性を示すため、材料によるエ
ネルギー損失が小さいという利点も有する。 Furthermore, this material has low resistance and high conductivity at a high degree of sintering, so it also has the advantage of low energy loss due to the material.
〔実施例〕
次に実施例により本発明をさらに詳細に説明す
る。[Example] Next, the present invention will be explained in more detail with reference to Examples.
実施例
SnO2 ５％を固溶させたα−Fe2O3の焼結体を
作用電極とし、白金を対極としてPt｜0.5M
H2SO4｜α−Fe2O3型の光電池を形成させた。こ
の作用電極の対向面は研磨されており、反対面に
はめつき用マスク剤を被覆した。Example A sintered body of α-Fe 2 O 3 containing 5% SnO 2 as a solid solution was used as the working electrode, and Pt｜0.5M was used as the counter electrode.
A photovoltaic cell of the H 2 SO 4 |α−Fe 2 O 3 type was formed. The opposite surface of this working electrode was polished, and the opposite surface was coated with a masking agent for plating.
次いで、飽和カロメル電池を電解質液中に挿入
し、α−Fe2O3作用電極との間の光起電力及び対
極のPtとα−Fe2O3作用電極との間の起電力を光
照射しない状態及び500Wキセノンランプで照射
した状態を測定した。 Next, a saturated calomel battery is inserted into the electrolyte solution, and the photovoltaic force between the α-Fe 2 O 3 working electrode and the electromotive force between the counter electrode Pt and the α-Fe 2 O 3 working electrode are irradiated with light. Measurements were made without irradiation and with irradiation using a 500W xenon lamp.
このようにして得られた、光起電力効果によつ
て生じる発生電圧の波形と応答性を第１図に示
す。この図から分かるように、試料表面の状態に
より同一試料においても波形は異なるが、最大
0.6Vの電圧の発生が認められた。 FIG. 1 shows the waveform and response of the voltage generated by the photovoltaic effect thus obtained. As can be seen from this figure, the waveforms differ even for the same sample depending on the condition of the sample surface, but the maximum
Generation of a voltage of 0.6V was observed.
また、第２図は光電池の出力を示すグラフであ
るが、この際のフイルフアクターを0.5としたと
きの光変換効率は約0.57％になる。 Further, FIG. 2 is a graph showing the output of the photovoltaic cell, and when the film factor is set to 0.5, the light conversion efficiency is about 0.57%.
第１図は、本発明材料について光照射したとき
の、光起電力効果による発生電圧の波形図、第２
図は本発明材料を用いた光電池の出力を示すグラ
フである。
Figure 1 is a waveform diagram of the voltage generated due to the photovoltaic effect when the material of the present invention is irradiated with light.
The figure is a graph showing the output of a photovoltaic cell using the material of the present invention.
Claims (1)
も１種を固溶させて焼結した半導体から成る光変
換機能材料。1. A light conversion functional material made of a semiconductor obtained by dissolving at least one of SnO 2 and TiO 2 into an α-Fe 2 O 3 base material and sintering the mixture.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58206313A JPS6099341A (en) | 1983-11-02 | 1983-11-02 | Method for utilizing iron oxide powder and its sintered body as phototransducing functional material |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP58206313A JPS6099341A (en) | 1983-11-02 | 1983-11-02 | Method for utilizing iron oxide powder and its sintered body as phototransducing functional material |
Related Child Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP2127781A Division JPH03186348A (en) | 1990-05-17 | 1990-05-17 | Photocatalyst |
| JP2127780A Division JPH0320659A (en) | 1990-05-17 | 1990-05-17 | Gas sensor element |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6099341A JPS6099341A (en) | 1985-06-03 |
| JPH0346421B2 true JPH0346421B2 (en) | 1991-07-16 |
Family
ID=16521228
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP58206313A Granted JPS6099341A (en) | 1983-11-02 | 1983-11-02 | Method for utilizing iron oxide powder and its sintered body as phototransducing functional material |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6099341A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3471438B2 (en) * | 1993-12-06 | 2003-12-02 | 株式会社ショーワ | Shock absorber valve structure |
| JP2008057685A (en) * | 2006-08-31 | 2008-03-13 | Hitachi Ltd | Hydraulic shock absorber |
-
1983
- 1983-11-02 JP JP58206313A patent/JPS6099341A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS6099341A (en) | 1985-06-03 |
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