JP4793071B2 - 表示装置および表示装置の製造方法 - Google Patents
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Description
図1は、本発明の一例となる実施形態の表示装置の要部断面図である。この図に示す表示装置1は、基板3上に、赤色(R)、緑色(G)、青色(B)の各色に発光する複数の有機電界発光素子5(5r、5g、5b)を配列形成してなるフルカラー表示のフラットパネルディスプレイである。尚、以下においては、赤色に発光する有機電界発光素子5を赤色発光素子5r、緑色に発光する有機電界発光素子5を緑色発光素子5g、青色に発光する有機電界発光素子5を青色発光素子5bとする。
図3は、本発明の第2実施形態の表示装置の要部断面図である。図3の表示装置1’が、図1の表示装置1と異なるところは、青色発光素子5b’が、第2発光層を備えていないことである。
また、以上の実施形態では、第2発光層を熱転写によって形成する場合を説明したが、精度良くパターン形成できる手法であれば、熱転写に限定されることはない。
さらに、以上の実施形態は、発光層を有する有機層のユニット(発光ユニット)を積層したタンデム型の有機EL素子にも応用することができ、同様の効果を得ることができる。
赤色発光の有機電界発光素子15rを作製した。(図1参照)
層13として、α−NPDを30nmの膜厚で、蒸着した。
緑色発光の有機電界発光素子15gを作製した。
青色発光の有機電界発光素子15bを作製した。
青色発光の有機電界発光素子15b’を作製した。
実施例1の手順において、(2)を行わず、(1),(3),(4),(5)を順に行い、第1発光層14を設けることなく、赤色発光層15rのみで発光層を構成した有機電界発光素子を作製した。
実施例2の手順において、(2)を行わず、(1),(3),(4),(5)を順に行い、第1発光層14を設けることなく、緑色発光層15gのみで発光層を構成した有機電界発光素子を作製した。
実施例3の手順において、(2)を行わず、(1),(3),(4),(5)を順に行い、第1発光層14を設けることなく、青色発光層15bのみで発光層を構成した有機電界発光素子を作製した。
以上のようにして作製した有機電界発光素子について、10mA/cm2の定電流密度を印加した状態で、分光放射輝度計を用いて発光効率、色度を測定した。また、同じドーパントを用いた素子同士が同輝度で発光するように電流印加を設定した状態で、寿命試験を行い、100時間経過後の相対輝度の減少率を測定した。これらの結果を、下記表1に示す。
Claims (8)
- 下部電極、少なくとも発光層を含む有機層、および上部電極をこの順に積層してなると共に、赤色、緑色、および青色に発光する複数の有機電界発光素子が基板上に配列され、
前記各色に発光する有機電界発光素子は、前記発光層が、蒸着によって形成された第1発光層と、熱転写によって形成された第2発光層と、を備え、
前記第1発光層は、青色または青色よりも短波長の発光を生じる
表示装置。 - 前記第2発光層は、青色または青色よりも長波長の発光を生じる
請求項1記載の表示装置。 - 前記第1発光層は、前記有機電界発光素子に共通に形成されている
請求項1記載の表示装置。 - 前記第1発光層が、前記第2発光層上に形成されている
請求項1記載の表示装置。 - 前記第2発光層が、前記第1発光層上に形成されている
請求項1記載の表示装置。 - 前記熱転写が真空中で行われた
請求項1記載の表示装置。 - 下部電極、少なくとも発光層を含む有機層、および上部電極をこの順に積層してなると共に、赤色、緑色、および青色に発光する複数の有機電界発光素子を基板上に形成する工程を備え、
前記有機電界発光素子を形成する工程は、
基板上に下部電極を形成した後、青色または青色よりも短波長の発光が生じる有機材料からなる第1発光層を、蒸着法により、形成する第1工程と、青色または青色よりも長波長の発光が生じる第2発光層を、熱転写法により、パターン形成する第2工程と、を前後して行うことで、前記各色に発光する有機電界発光素子において、前記第1発光層と前記第2発光層との2層構造からなる発光層を形成する工程を含む
表示装置の製造方法。 - 前記熱転写は、真空中で行う
請求項7記載の表示装置の製造方法。
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KR100670383B1 (ko) * | 2006-01-18 | 2007-01-16 | 삼성에스디아이 주식회사 | 유기 발광 소자 및 이를 구비한 평판 표시 장치 |
JP2008146904A (ja) | 2006-12-07 | 2008-06-26 | Sony Corp | 有機電界発光素子および表示装置 |
JP5023689B2 (ja) * | 2006-12-22 | 2012-09-12 | ソニー株式会社 | 有機電界発光素子および表示装置 |
US8119204B2 (en) | 2007-04-27 | 2012-02-21 | Semiconductor Energy Laboratory Co., Ltd. | Film formation method and method for manufacturing light-emitting device |
KR101563237B1 (ko) * | 2007-06-01 | 2015-10-26 | 가부시키가이샤 한도오따이 에네루기 켄큐쇼 | 제조장치 및 발광장치 제작방법 |
DE102009017064A1 (de) * | 2009-04-09 | 2010-10-14 | Merck Patent Gmbh | Organische Elektrolumineszenzvorrichtung |
KR101114348B1 (ko) * | 2011-03-08 | 2012-02-13 | 주식회사 엘지화학 | 유기발광소자의 봉지 구조 |
KR101114351B1 (ko) * | 2011-03-08 | 2012-02-13 | 주식회사 엘지화학 | 유기발광소자의 봉지 구조 |
KR101114350B1 (ko) * | 2011-03-08 | 2012-02-13 | 주식회사 엘지화학 | 유기발광소자의 봉지 구조 |
JP5783853B2 (ja) * | 2011-08-31 | 2015-09-24 | キヤノン株式会社 | 表示装置 |
KR101945930B1 (ko) * | 2012-01-05 | 2019-02-11 | 삼성디스플레이 주식회사 | 유기 발광 소자 |
JP6291698B2 (ja) * | 2013-11-15 | 2018-03-14 | 株式会社Joled | 有機el表示パネル、それを用いた表示装置および有機el表示パネルの製造方法 |
CN105244364A (zh) * | 2014-07-10 | 2016-01-13 | 上海和辉光电有限公司 | 一种有机发光器件及像素阵列 |
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US7275972B2 (en) * | 2003-08-22 | 2007-10-02 | 3M Innovative Properties Company | Method of making an electroluminescent device having a patterned emitter layer and non-patterned emitter layer |
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