JP6178966B2 - 改善された性能を有する発光トランジスタ - Google Patents
改善された性能を有する発光トランジスタ Download PDFInfo
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- JP6178966B2 JP6178966B2 JP2015528710A JP2015528710A JP6178966B2 JP 6178966 B2 JP6178966 B2 JP 6178966B2 JP 2015528710 A JP2015528710 A JP 2015528710A JP 2015528710 A JP2015528710 A JP 2015528710A JP 6178966 B2 JP6178966 B2 JP 6178966B2
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- XSVXWCZFSFKRDO-UHFFFAOYSA-N triphenyl-(3-triphenylsilylphenyl)silane Chemical compound C1=CC=CC=C1[Si](C=1C=C(C=CC=1)[Si](C=1C=CC=CC=1)(C=1C=CC=CC=1)C=1C=CC=CC=1)(C=1C=CC=CC=1)C1=CC=CC=C1 XSVXWCZFSFKRDO-UHFFFAOYSA-N 0.000 description 1
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Description
nh+(ex)=nh+(total)−nh+(ch)−nh+(leak)1−nh+(leak)2
ne-(ex)=ne-(total)−ne-(ch)−ne-(leak)1−ne-(leak)2
で表すことができ、式中nh+(total)およびne-(total)は、それぞれ正孔電極および電子電極から注入された電荷の総数を表し、n(ch)は、発光副層に静電気的に引き寄せられないチャネル領域中の電荷の数を表し、n(leak)1およびn(leak)2は、電極領域の下または上の発光副層を横断する電荷の数を表す。電極領域の下または上の不均衡な電荷キャリア密度のため(ne-(leak)1<<nh+(leak)2およびnh+(leak)1<<ne-(leak)2)、これらの領域中の電荷キャリアは励起子を形成しそうもなく、ne-(leak)1、ne-(leak)2、nh+(leak)1、およびnh+(leak)2はリーク電流と見なすことができる。電気絶縁素子22および/または24を組み込むことによって、これらのリーク電流の減少および/または除去が可能であり、したがってチャネル領域中の発光副層8bを横断する反対の種類の電荷キャリアの密度が増加し、それによって励起子形成の確率が最大化されると予想される。
to AlQ3 based OLEDs by means of an oxidized transport layer,”Materials Research Society Symposium Proceedings,708(Organic Optoelectronic Materials,Processing and Devices):101−106(2002);Crone et al.,“Charge injection and transport in single−layer organic light−emitting diodes,”Applied Physics Letters,73(21):3162−3164(1998);およびPark et al.,“Charge injection and photooxidation of single conjugated polymer molecules,”Journal of the American Chemical Society,126(13):4116−7(2004)を参照されたい。
Claims (17)
- 発光トランジスタデバイスであって、
基板と、
ゲート電極と、
1つ以上の有機副層を含むチャネル層であって、前記1つ以上の有機副層が、
電子輸送半導体材料を含む第1の副層、
正孔輸送半導体材料を含む第2の副層、および
エレクトロルミネッセンス半導体材料を含み前記第1の副層と前記第2の副層との間に配置される第3の副層、
を含むチャネル層と、
前記ゲート電極と前記チャネル層との間に配置されるゲート絶縁層と、
正孔電極および電子電極であって、前記正孔電極を通過して正電荷キャリアが前記チャネル層に注入され、前記電子電極を通過して負電荷キャリアが前記チャネル層に注入され、前記正孔電極および前記電子電極は、それらの間のチャネル領域の長さ(L)を画定する平面距離で互いに離れて配置され、前記正孔電極が前記チャネル層の前記第2の副層に接触し、前記電子電極が前記チャネル層の前記第1の副層に接触している正孔電極および電子電極と、
を含み、
前記チャネル層は、前記正孔電極と前記チャネル層の前記第1の副層との間に配置される第1の電気絶縁素子、および、前記電子電極と前記チャネル層の前記第2の副層との間に配置される第2の電気絶縁素子をさらに含み、前記第1の電気絶縁素子および前記第2の電気絶縁素子は、前記チャネル領域の長さより短い平面距離で互いに離れて配置され、
第1のバイアス電圧が前記ゲート電極に印加されると共に、前記電子電極と前記正孔電極との間で第2のバイアス電圧が維持され、当該発光トランジスタデバイスは、前記第3の副層の平面に平行なストライプとして発光するよう構成されている、
発光トランジスタデバイス。 - 前記第1の電気絶縁素子および/または前記第2の電気絶縁素子が前記第3の副層に接触している、請求項1に記載のデバイス。
- 前記第1の電気絶縁素子および前記第2の電気絶縁素子の両方が前記第3の副層中に配置される、請求項1に記載のデバイス。
- 前記第1の電気絶縁素子が前記第2の副層と前記第3の副層との間の界面に配置され、前記第2の電気絶縁素子が前記第1の副層と前記第3の副層との間の界面に配置される、請求項1に記載のデバイス。
- 前記電子電極が前記第2の電気絶縁素子に接触している、請求項4に記載のデバイス。
- 前記電子電極が前記第1の副層中に配置され、および/または、前記正孔電極は前記第2の副層中に配置される、請求項5に記載のデバイス。
- 前記正孔電極が前記第1の電気絶縁素子に接触している、請求項6に記載のデバイス。
- 前記第1の電気絶縁素子および前記第2の電気絶縁素子の両方が前記第1の副層と前記第3の副層との間の界面に配置される、請求項1に記載のデバイス。
- 前記第1の電気絶縁素子および前記第2の電気絶縁素子の両方が前記第2の副層と前記第3の副層との間の界面に配置される、請求項1に記載のデバイス。
- 前記第1の電気絶縁素子、前記第2の電気絶縁素子、および前記エレクトロルミネッセンス半導体材料を合わせたものが前記第3の副層を構成している、請求項1に記載のデバイス。
- 前記電子輸送半導体材料と前記電子電極との間に堆積された電子注入層をさらに含む、請求項1に記載のデバイス。
- 前記正孔輸送半導体材料と前記正孔電極との間に堆積された正孔注入層をさらに含む、請求項1に記載のデバイス。
- 前記チャネル層の上面を覆うパッシベーション層をさらに含む、請求項1に記載のデバイス。
- 前記基板が、前記基板の表面上に堆積された表面改質材料を含む、請求項1に記載のデバイス。
- 前記ゲート電極が、Lと同じ長さ(LG)を有し、前記ゲート電極の端部が、前記正孔電極の端部および前記電子電極の端部の位置と合わせられる、請求項1に記載のデバイス。
- 前記ゲート電極がLを超える長さ(LG)を有し、前記ゲート電極の少なくとも1つの端部が前記正孔電極および前記電子電極の一方と重なり合う、請求項1に記載のデバイス。
- 互いに相互接続され基板上に堆積された、請求項1〜16のいずれか一項に記載の複数の同一または異なる発光トランジスタデバイスを含む、画像を形成するための光電子デバイス。
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