JP2006278507A - 光電変換装置、画像表示装置、光電変換装置の製造方法、および画像表示装置の製造方法 - Google Patents
光電変換装置、画像表示装置、光電変換装置の製造方法、および画像表示装置の製造方法 Download PDFInfo
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- JP2006278507A JP2006278507A JP2005092494A JP2005092494A JP2006278507A JP 2006278507 A JP2006278507 A JP 2006278507A JP 2005092494 A JP2005092494 A JP 2005092494A JP 2005092494 A JP2005092494 A JP 2005092494A JP 2006278507 A JP2006278507 A JP 2006278507A
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Abstract
【解決手段】 基板(10)上に形成された第1の電極(12)と、第1の電極(12)に形成されたP型半導体層(14)と、P型半導体層(14)上に形成されたI型半導体層(16)と、I型半導体層(16)上に形成されたN型半導体層(18)と、N型半導体層(18)上に形成された第2の電極(20)と、第2の電極(20)上に、図形を形成するように配置された色素からなる色素層(22)を含み、I型半導体層(16)は、P型半導体層(14)上に、離散的に配置された島状のシリコン膜から形成され、色素は、第2の電極(20)上でI型半導体層(16)と重複しない領域に配置される。
【選択図】 図2
Description
また、特許文献4には、光電変換装置を形成する電極、半導体層、および色素層を、表示する図形等の形状に形成する方法が記載されている。
図1は、本発明の光電変換装置1の実施形態を示す斜視図である。なお、以下の説明では、図1中の紙面上、上側を「上」または「上方」、下側を「下」または「下方」と言い、各層(各部材)の上側の面を「上面」、下側の面を「下面」と言う。
次に各層(各部)の構成について説明する。
まず図2(A)に示すように、基板10上に、第1の電極12を形成する。
次に、図2(B)に示すように、第1の電極12上に、第1の半導体層としてP型半導体層14を形成する。
次に図2(C)に示すように、不純物を含まない液体シリコン材料をインクジェット法によって吐出し、P型半導体層14に液滴を配置し、乾燥させて、シリコン膜の前駆体膜16’を形成する。
続いて、図2(D)に示すように、400℃、1時間の焼成を行い、シリコン膜の前駆体膜16’を、アモルファスシリコン膜(I型半導体層)16に変換させる。
次に、図2(E)に示すように、島状に配置されたI型半導体層16の間隙を絶縁膜17で埋める。絶縁膜17の種類は特に限定されず、SiO2膜等を用いることができる。形成方法も一般的なスパッタ法、CVD法等などを用いることができる。本発明に係る光電変換装置の製造方法の特徴は、真空プロセスを必要とせず、液体材料を用いてI型半導体層を形成することにあるので、他の薄膜も液体材料を用いる方法に統一することによって、同一の装置、環境下ですべての工程を行うことができる。したがって、絶縁膜17は、例えば、ポリシラザンをインクジェット法によって島と島の間の領域にのみ塗布し、これを大気中で焼成し、SiO2膜とすることによって形成できる。あるいは、上述したケイ素化合物を含む液体を塗布し、大気中で焼成してもよい。絶縁膜17の厚さは200nm〜500nm程度が望ましい。
次に、図2(F)に示すように、N型半導体層18および第2の電極20を形成する。
次に、図2(G)に示すように、第2の電極20上に所定の図形の形状を描くように色素層22を形成する。色素層22は、図3に示す液滴吐出装置を用いて色素をインクジェット法により吐出し、色素の液滴を配置することにより形成される。ここでは、図1に示す「E」の形状を形成するように色素が配置される。
本実施形態では、N型半導体層18を形成した後で、N型半導体層18上に色素層22を形成する。図5に、実施例2による光電変換装置1の製造工程を示す。図5(A)〜(E)に示す工程は実施例1と同様である。
図5(F)に示すように、N型半導体層18を形成する。実施例1と同様に、リン変性シラン化合物1−ホスホシクロペンタシラン1mgとオクタシラキュバン(化合物2)1gをトルエン10gとテトラヒドロナフタレンの混合溶媒に溶解して塗布溶液を調製し、アルゴン雰囲気中でスピンコートし150℃で乾燥した後、水素3%含有アルゴン中で450℃で熱分解を行えば、膜厚60nm程度のN型半導体層18を形成することができる。
次に、図5(G)に示すように、N型半導体層18上に所定の図形の形状を描くように色素層22を形成する。色素層22は、実施例1と同様に、色素をインクジェット法によって吐出することにより形成される。
最後に、図5(H)に示すように、色素層22上に、インジウムとスズを含む有機化合物の液体材料を塗布し、熱処理を行ってITO膜に変換し、第2の電極20を形成する。
本発明の画像表示装置は、上記のような光電変換装置1を備えるものである。
Claims (12)
- 基板上に配置された複数の光電変換領域と、
前記基板上の前記光電変換領域相互間に配置された着色領域と、を有し、
前記着色領域は前記基板上に画像を形成することを特徴とする光電変換装置。 - 基板上に形成された第1の電極と、
前記第1の電極上に形成された第1導電型半導体層と、
前記第1導電型半導体層上に形成された複数のI型半導体膜と、
前記複数のI型半導体膜上に形成された第2導電型半導体層と、
前記第2導電型半導体層上に形成された第2の電極と、を有し、
前記複数のI型半導体膜は各々間隔を開けて島状に形成され、
前記複数のI型半導体膜と重複しない領域に色素が配置され、
前記色素を構成要素に含む画像が形成されていることを特徴とする光電変換装置。 - 請求項2に記載の光電変換装置において、
前記色素は前記第2の電極上に形成されていることを特徴とする光電変換装置。 - 請求項2に記載の光電変換装置において、
前記色素は前記第1導電型半導体層と前記第2導電型半導体層の間で前記I型半導体膜の形成されていない領域に形成されていることを特徴とする光電変換装置。 - 請求項2乃至4のいずれかに記載の光電変換装置において、
前記第1導電型半導体層と前記第2導電型半導体層の間で前記I型半導体膜の形成されていない領域に絶縁膜が形成されていることを特徴とする光電変換装置。 - 請求項2乃至4のいずれかに記載の光電変換装置において、
前記第1導電型半導体層と前記第2導電型半導体層の間で前記I型半導体膜の形成されていない領域に前記I型半導体膜よりも厚みの小さい半導体膜が形成されていることを特徴とする光電変換装置。 - 請求項2乃至6のいずれかに記載の光電変換装置において、
前記第2導電型半導体層の前記色素と重複しない領域と前記色素とが前記画像を形成する要素として構成されていることを特徴とする光電変換装置。 - 請求項1乃至7に記載の光電変換装置を備えることを特徴とする画像表示装置。
- 基板上に第1導電型半導体層を形成する工程と、
前記第1導電型半導体層上に複数の液体材料をそれぞれ間隔が空くように配置する工程と、
前記複数の液体材料を焼成し複数のI型半導体膜を形成する工程と、
前記複数のI型半導体膜上に第2導電型半導体層を形成する工程と、
前記複数のI型半導体膜と重複しない領域に色素を配置する工程と、を有し 、
前記色素は画像を形成する要素であることを特徴とする光電変換装置の製造
方法。 - 請求項9に記載の光電変換装置の製造方法において、
前記複数の液体材料と前記色素とはインクジェット装置のノズルより吐出されて配置されることを特徴とする光電変換装置の製造方法。 - 請求項10に記載の光電変換装置の製造方法において、
前記複数の液体材料を配置する工程に先立ち、前記複数の液体材料と前記色素との配置を画像処理情報に基いて決定する工程をさらに有することを特徴とする光電変換装置の製造方法。 - 請求項9乃至11のいずれかに記載の光電変換装置の製造方法を用いることを特徴とする画像表示装置の製造方法。
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