JP2017157179A - 入力装置 - Google Patents
入力装置 Download PDFInfo
- Publication number
- JP2017157179A JP2017157179A JP2016042895A JP2016042895A JP2017157179A JP 2017157179 A JP2017157179 A JP 2017157179A JP 2016042895 A JP2016042895 A JP 2016042895A JP 2016042895 A JP2016042895 A JP 2016042895A JP 2017157179 A JP2017157179 A JP 2017157179A
- Authority
- JP
- Japan
- Prior art keywords
- substrate
- touch sensor
- power generation
- photoelectric conversion
- generation unit
- 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.)
- Granted
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Abstract
Description
タッチセンサ120は、上述したように、基板121と、基板121上に設けられる電極121aと、基板121に対し電極121aを覆うように設けられる被覆層122とを備えている。
基板121としては、例えばPETフィルム、PENフィルムなどの樹脂フィルム、ガラスなどの無機材料で構成される基板などを用いることができる。
電極121aは、タッチセンサ120の基板121の厚さ方向に表示部としての非発電部70及び電極121aを見た場合に、表示部70と重なるように設けられる。電極121aは、発電部50への光の入射量を増加させるため、メッシュ配線で構成されることが好ましい。メッシュ配線で構成される場合、電極121aとしては、銀又は銅などの不透明な金属材料やカーボン材料を用いることができる。ここで、メッシュ配線の線幅は例えば100μm以下とし、タッチセンサ120の基板121の厚さ方向に光を入射させた場合に、メッシュ配線を通過する部分と、メッシュ配線以外の部分を通過する部分との可視光の透過率の差を10%以下とすることが好ましい。但し、電極121aは必ずしもメッシュ配線で構成される必要はない。例えば電極121aをITOやFTOなどの透明金属材料で構成することができる。
被覆層122は透明材料で構成されればよく、このような透明材料としては、例えばエポキシ樹脂、アクリル樹脂、ポリエステル樹脂、ウレタン樹脂、ビニル樹脂、シリコーン樹脂、フェノール樹脂及びポリイミド樹脂などの透明樹脂が挙げられる。
次に、光電変換セル130について詳細に説明する。
透明電極基板20は、透明基板21と、透明基板21のうち対向基板30側に設けられる電極としての透明導電層22とを備えている。
透明基板21を構成する材料は、例えば透明な絶縁材料であればよく、このような透明な材料としては、例えばホウケイ酸ガラス、ソーダライムガラス、白板ガラス、石英ガラスなどのガラス、ポリエチレンテレフタレート(PET)、ポリエチレンナフタレート(PEN)、ポリカーボネート(PC)、および、ポリエーテルスルフォン(PES)などが挙げられる。透明基板21の厚さは、光電変換セル130のサイズに応じて適宜決定され、特に限定されるものではないが、例えば50〜10000μmの範囲にすればよい。
透明導電層22を構成する材料としては、例えばスズ添加酸化インジウム(ITO)、酸化スズ(SnO2)、及び、フッ素添加酸化スズ(FTO)などの導電性金属酸化物が挙げられる。透明導電層22は、単層でも、異なる導電性金属酸化物で構成される複数の層の積層体で構成されてもよい。透明導電層22が単層で構成される場合、透明導電層22は、高い耐熱性及び耐薬品性を有することから、FTOで構成されることが好ましい。透明導電層22の厚さは例えば0.01〜2μmの範囲にすればよい。
対向基板30は、本実施形態では対極で構成されており、導電性基板31と、導電性基板31のうち透明電極基板20側に設けられて電解質60の還元に寄与する触媒層32とを備えている。
封止部40としては、例えば変性ポリオレフィン樹脂、ビニルアルコール重合体などの熱可塑性樹脂、及び、紫外線硬化樹脂などの樹脂が挙げられる。変性ポリオレフィン樹脂としては、例えばアイオノマー、エチレン−ビニル酢酸無水物共重合体、エチレン−メタクリル酸共重合体およびエチレン−ビニルアルコール共重合体が挙げられる。これらの樹脂は単独で又は2種以上を組み合せて用いることができる。
発電部50は、酸化物半導体層と、酸化物半導体層に担持される色素とを含有する。
酸化物半導体層は酸化物半導体粒子で構成されている。酸化物半導体粒子は、例えば酸化チタン(TiO2)、酸化亜鉛(ZnO)、酸化タングステン(WO3)、酸化ニオブ(Nb2O5)、チタン酸ストロンチウム(SrTiO3)、酸化スズ(SnO2)、酸化インジウム(In3O3)、酸化ジルコニウム(ZrO2)、酸化タリウム(Ta2O5)、酸化ランタン(La2O3)、酸化イットリウム(Y2O3)、酸化ホルミウム(Ho2O3)、酸化ビスマス(Bi2O3)、酸化セリウム(CeO2)、酸化アルミニウム(Al2O3)又はこれらの2種以上で構成される。酸化物半導体層50の厚さは、例えば0.1〜100μmとすればよい。
色素としては、例えばビピリジン構造、ターピリジン構造などを含む配位子を有するルテニウム錯体や、ポルフィリン、エオシン、ローダミン、メロシアニンなどの有機色素などの光増感色素や、ハロゲン化鉛系ペロブスカイト結晶などの有機−無機複合色素などが挙げられる。ハロゲン化鉛系ペロブスカイトとしては、例えばCH3NH3PbX3(X=Cl、Br、I)が用いられる。上記色素の中でも、ビピリジン構造又はターピリジン構造を含む配位子を有するルテニウム錯体が好ましい。この場合、光電変換セル130の光電変換特性をより向上させることができる。なお、色素として、光増感色素を用いる場合には、光電変換セル130は色素増感光電変換セルとなる。
非発電部70は光電変換機能を有しないものであればよい。但し、本実施形態では、非発電部70は表示部を兼ねるため、タッチセンサ120の基板121の厚さ方向に非発電部70及び発電部50を見た場合に、発電部50と識別して視認可能であることが必要である。具体的には、非発電部70は、着色材を含む絶縁部を有して構成される。ここで、着色材は、可視光の波長領域に吸収ピークを有する物質をいう。
被覆部は絶縁材料で構成される。この絶縁材料としては、絶縁部を構成する絶縁材料と同様のものを用いることができる。
電解質60は、酸化還元対と有機溶媒とを含んでいる。有機溶媒としては、アセトニトリル、メトキシアセトニトリル、メトキシプロピオニトリル、プロピオニトリル、エチレンカーボネート、プロピレンカーボネート、ジエチルカーボネート、γ−ブチロラクトン、バレロニトリル、ピバロニトリル、などを用いることができる。酸化還元対としては、例えばヨウ化物イオン/ポリヨウ化物イオン(例えばI−/I3 −)、臭化物イオン/ポリ臭化物イオンなどのハロゲン原子を含む酸化還元対のほか、亜鉛錯体、鉄錯体、コバルト錯体などのレドックス対が挙げられる。なお、ヨウ化物イオン/ポリヨウ化物イオンは、ヨウ素(I2)と、アニオンとしてのアイオダイド(I−)を含む塩(イオン性液体や固体塩)とによって形成することができる。アニオンとしてアイオダイドを有するイオン性液体を用いる場合には、ヨウ素のみ添加すればよく、有機溶媒や、アニオンとしてアイオダイド以外のイオン性液体を用いる場合には、LiIやテトラブチルアンモニウムアイオダイドなどのアニオンとしてアイオダイド(I−)を含む塩を添加すればよい。また電解質60は、有機溶媒に代えて、イオン液体を用いてもよい。イオン液体としては、例えばピリジニウム塩、イミダゾリウム塩、トリアゾリウム塩等の既知のヨウ素塩などが用いられる。このようなヨウ素塩としては、例えば、1−ヘキシル−3−メチルイミダゾリウムアイオダイド、1−エチル−3−プロピルイミダゾリウムアイオダイド、1−エチル−3−メチルイミダゾリウムアイオダイド、1,2−ジメチル−3−プロピルイミダゾリウムアイオダイド、1−ブチル−3−メチルイミダゾリウムアイオダイド、又は、1−メチル−3−プロピルイミダゾリウムアイオダイドが好適に用いられる。
まずガラスからなる厚さ1mmの透明基板21の上に、厚さ1μmのFTOからなる透明導電層22を形成してなる積層体を準備した。
透明導電層上に、ガラスフリット及び着色材を含む絶縁部の前駆体を形成せず、絶縁部の前駆体の全体を覆うように被覆部の前駆体を形成しないことにより非発電部を形成しなかったこと以外は実施例1と同様にして入力装置を作製した。
実施例1および比較例1で得られた入力装置の光電変換セルについて、初期出力(η0)を測定した。続いて、これらの光電変換セルに対し、白色LEDの光源を用いて光を1000時間入射させ、その後に出力(η)を測定した。そして、下記式:
出力の保持率(%)=η/η0×100
に基づき、出力の保持率(出力保持率)を算出した。結果を表1に示す。
30…対向基板
40…封止部
50…発電部
60…電解質
70…非発電部
100…入力装置
120…タッチセンサ
121…基板
121a…電極
125…配線
130…光電変換セル
Claims (5)
- 少なくとも1つの光電変換セルと、
前記少なくとも1つの光電変換セルに対向し、基板を有するタッチセンサとを備え、
前記タッチセンサ及び前記光電変換セルを前記タッチセンサの前記基板の厚さ方向に見た場合に表示部を視認することが可能な入力装置であって、
前記光電変換セルが、
前記タッチセンサ側に設けられる透明電極基板と、
前記透明電極基板に対し前記タッチセンサと反対側に設けられ、前記透明電極基板に対向する対向基板と、
前記透明電極基板と前記対向基板との間に設けられ、色素を含有する発電部と、
前記発電部及び前記表示部を前記タッチセンサの前記基板の厚さ方向に見た場合に前記発電部と隣接するように且つ前記表示部と重なるように設けられる非発電部とを有している、入力装置。 - 前記光電変換セルが、前記透明電極基板と前記対向基板とを接合する環状の封止部をさらに有し、
前記タッチセンサが、前記基板上に設けられ、前記タッチセンサ及び前記光電変換セルを前記タッチセンサの前記基板の厚さ方向に見た場合に前記表示部と重なるように設けられる電極と、
前記電極に接続される配線とを有し、
前記配線及び前記環状の封止部を前記タッチセンサの前記基板の厚さ方向に見た場合に、前記配線の少なくとも一部が、前記環状の封止部と重なるように且つ前記環状の封止部に沿うように配置されている、請求項1に記載の入力装置。 - 前記光電変換セルが、前記透明電極基板と前記対向基板との間に電解質を有し、
前記非発電部が、着色材を含有する絶縁部と、前記絶縁部を被覆する被覆部とを有する、請求項1又は2に記載の入力装置。 - 前記非発電部が前記表示部を兼ねる、請求項1〜3のいずれか一項に記載の入力装置。
- 前記少なくとも1つの光電変換セルが複数の光電変換セルで構成され、前記複数の光電変換セルが直列に接続されている、請求項1〜4のいずれか一項に記載の入力装置。
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- 2017-02-23 US US16/082,187 patent/US20200293135A1/en not_active Abandoned
- 2017-02-23 EP EP17759800.0A patent/EP3425486A4/en not_active Withdrawn
- 2017-02-23 WO PCT/JP2017/006836 patent/WO2017150334A1/ja active Application Filing
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EP3425486A1 (en) | 2019-01-09 |
WO2017150334A1 (ja) | 2017-09-08 |
EP3425486A4 (en) | 2019-08-28 |
US20200293135A1 (en) | 2020-09-17 |
CN108475127A (zh) | 2018-08-31 |
JP6598710B2 (ja) | 2019-10-30 |
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