JP5313422B2 - 励起子阻止層をもつ有機感光性オプトエレクトロニクス素子 - Google Patents
励起子阻止層をもつ有機感光性オプトエレクトロニクス素子 Download PDFInfo
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- JP5313422B2 JP5313422B2 JP2001540845A JP2001540845A JP5313422B2 JP 5313422 B2 JP5313422 B2 JP 5313422B2 JP 2001540845 A JP2001540845 A JP 2001540845A JP 2001540845 A JP2001540845 A JP 2001540845A JP 5313422 B2 JP5313422 B2 JP 5313422B2
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- H10K30/353—Organic devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation comprising bulk heterojunctions, e.g. interpenetrating networks of donor and acceptor material domains comprising blocking layers, e.g. exciton blocking layers
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Description
本発明は一般的には有機薄膜感光性オプトエレクトロニクス素子に関する。より詳しくは、本発明は励起子阻止層(exciton blocking layer)を有する有機感光性オプトエレクトロニクス素子たとえば太陽電池及び可視スペクトル受光素子に関する。
オプトエレクトロニクス素子は材料の光学的および電子工学的性質に依って電磁放射を電子工学的に生成もしくは検出するか又は周囲電磁放射から電気を発生させるかどちらかである。感光性オプトエレクトロニクス素子は電磁放射を電気に変換する。光起電力(photovoltaic)(PV)デバイスとしても知られる、太陽電池は特に電力を発生させるために使用される。PVデバイスは電力を消費する負荷装置を駆動するのに使用されて例えばライティング(lighting)やヒーティング(heating)を提供する又はコンピューターのような電子機器または遠隔の監視もしくは通信装置を操作する。これら電力発生用途はまた、しばしば、日光またはその他の周囲光源からの直接照明が利用可能でないときにも装置操作が続けられるようにバッテリーまたはその他のエネルギー貯蔵機器を伴う。ここに使用されるとき、用語「抵抗負荷(resistive load)」は何らかの電力を消費または貯蔵する機器、装置またはシステムを称する。
ここで、ffは常に1未満である、何故ならば、実用においてISCとVOCは決して同時には得られないからである。それでも、ffが1に接近するほど、デバイスはより効率的である。
効率的な有機感光性オプトエレクトロニクス素子の設計にはいくつかの指針が銘記されなければならない。励起子拡散長さLDは層厚さLより大きいか又はそれに匹敵することが望ましい、何故ならば、殆どの励起子解離(dissociation)は界面で起こるであろうからである。LDがL未満であると、多数の励起子が解離前に再結合するかも知れない。さらには、光導電性材料の全厚は太陽電池に入射した輻射線のほぼ全てが吸収されて励起子を生成するように電磁輻射線吸収長さ1/α(ここで、αは吸収係数である)のオーダーであることが望ましい。しかしながら、厚さはヘテロ接合電界の度合に比べて大きすぎて多数の励起子が無電界領域(field−free region)で生成されるようにはなるべきではない。これについての1つの理由は電界が励起子の解離を助けるということである。別の理由は励起子が無電界領域で解離すると対再結合、または消光、をこうむり光電流に何も寄与しないらしいということである。さらに、電界は電極/半導体界面に存在するかもしれない。電極界面におけるこれら電界も励起子消滅を促すことがある。さらに、光導電層の厚さは有機半導体の高いバルク抵抗率(bulk resistivity)のせいで過度の直列抵抗を避けるために可能な限り薄くすべきである。
デバイスが構成され、そしてデータ例は本発明の例示態様特に図3に描かれたデバイスについて記録された。
Claims (24)
- 重ねあわされた関係にある2つの電極;
2つの電極間の、第一の光導電性有機半導体材料からなる正孔輸送層;
2つの電極間のそして正孔輸送層に隣接した、第二の光導電性有機半導体材料からなる電子輸送層;および
2つの電極間のそして電極の少なくとも1つに隣接し、隣接する有機半導体材料からなる層と比較して大きなHOMO−LUMOエネルギーギャップを有する少なくとも1つの励起子阻止層;
を含む、有機の感光性オプトエレクトロニクス素子。
- 1つの励起子阻止層が、電子輸送層と励起子阻止層に隣接した電極との間にある、請求項1の素子。
- 1つの励起子阻止層が、正孔輸送層と励起子阻止層に隣接した電極との間にある、請求項1の素子。
- 少なくとも1つの励起子阻止層が第一の励起子阻止層および第二の励起子阻止層であり、第一の励起子阻止層が電子輸送層と第一の励起子阻止層に隣接した電極との間にあり、第二の励起子阻止層が正孔輸送層と第二の励起子阻止層に隣接した電極との間にある、請求項1の素子。
- 第一の光導電性有機半導体材料および第二の光導電性有機半導体材料が可視スペクトルに実質的な分光感度を有するように選ばれている、請求項1の素子。
- 電子輸送層が3,4,9,10−ペリレンテトラカルボキシリック−ビス−ベンズイミダゾール(PTCBI)を含み;
正孔輸送層が銅フタロシアニン(CuPc)を含み;そして
励起子阻止層が2,9−ジメチル−4,7−ジフェニル−1,10−フェナントロリン(BCP)を含む;
請求項2の素子。
- 電子輸送層が3,4,9,10−ペリレンテトラカルボキシリック−ビス−ベンズイミダゾール(PTCBI)を含み;
正孔輸送層が銅フタロシアニン(CuPc)を含み;そして
励起子阻止層が4,4’,4”−トリス{N,−(3−メチルフェニル)−N−フェニルアミノ}トリフェニルアミン(m−MTDATA)またはポリエチレンジオキシチオフェン(PEDOT)を含む;
請求項3の素子。
- 電子輸送層、正孔輸送層、および励起子阻止層が、導波路を形成する2つの平行な平面の反射性表面の間に配置されている、請求項1の素子。
- 2つの反射性表面の1つが、素子に入射する光を通す開口を有する、請求項8の素子。
- 反射性表面の平面に平行な方向から光が素子に入るように2つの反射性表面の間に透明な開口部を有する、請求項8の素子。
- 複数の感光性オプトエレクトロニック・サブセルから構成された積層有機感光性オプトエレクトロニクス素子において、少なくとも1つのサブセルが、隣接する有機半導体材料からなる層と比較して大きなHOMO−LUMOエネルギーギャップを有する励起子阻止層を含む、積層有機感光性オプトエレクトロニクス素子。
- 少なくとも一つのサブセルが、3,4,9,10−ペリレンテトラカルボキシリック−ビス−ベンズイミダゾール(PTCBI)を含む電子輸送層と、電子輸送層に隣接しそして銅フタロシアニン(CuPc)を含む正孔輸送層とを有する、請求項11の素子。
- 励起子阻止層が2,9−ジメチル−4,7−ジフェニル−1,10−フェナントロリン(BCP)を含み、そして電子輸送層に隣接する、請求項12の素子。
- 励起子阻止層が4,4’,4”−トリス{N,−(3−メチルフェニル)−N−フェニルアミノ}トリフェニルアミン(m−MTDATA)またはポリエチレンジオキシチオフェン(PEDOT)を含み、そして正孔輸送層に隣接する、請求項12の素子。
- 重ねあわされた関係にある陰極および陽極;
陰極と陽極の間に配置され、正孔輸送層および電子輸送層の各々が有機半導体材料を含む、電子輸送層に隣接している正孔輸送層の複数のペア;および
陰極および陽極の一方と、複数のペアとの間に配置され、励起子阻止層が正孔輸送層または電子輸送層に隣接し、かつ隣接する正孔輸送層または電子輸送層と比較して大きなHOMO−LUMOエネルギーギャップを有する励起子阻止層;
を含む、有機受光素子。
- 1つの励起子阻止層が陽極と複数のペアとの間に配置されている、請求項15の素子。
- 1つの励起子阻止層が陰極と複数のペアとの間に配置されている、請求項15の素子。
- 励起子阻止層が2,9−ジメチル−4,7−ジフェニル−1,10−フェナントロリン(BCP)を含む、請求項15の素子。
- 励起子阻止層が4,4’,4”−トリス{N,−(3−メチルフェニル)−N−フェニルアミノ}トリフェニルアミン(m−MTDATA)またはポリエチレンジオキシチオフェン(PEDOT)を含む、請求項15の素子。
- 複数のペアの正孔輸送層と電子輸送層が可視スペクトルに実質的な分光感度を有するように選ばれている、請求項15の素子。
- 複数のペアの各ペアが銅フタロシアニン(CuPc)と3,4,9,10−ペリレンテトラカルボキシリック−ビス−ベンズイミダゾール(PTCBI)を含む、請求項15の素子。
- 複数のペアが少なくとも5対からなる、請求項15の素子。
- 複数のペアが少なくとも10対からなる、請求項15の素子。
- 励起子阻止層が陽極と複数のペアとの間および陰極と複数のペアとの間に配置されている、請求項15の素子。
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1999
- 1999-11-26 US US09/449,801 patent/US6451415B1/en not_active Expired - Lifetime
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2000
- 2000-11-15 AU AU16096/01A patent/AU1609601A/en not_active Abandoned
- 2000-11-15 WO PCT/US2000/031312 patent/WO2001039276A1/en active Application Filing
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- 2000-11-15 JP JP2001540845A patent/JP5313422B2/ja not_active Expired - Lifetime
- 2000-11-15 EP EP00978656.7A patent/EP1234338B1/en not_active Expired - Lifetime
- 2000-11-15 EP EP11003172A patent/EP2400554A1/en not_active Withdrawn
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Also Published As
Publication number | Publication date |
---|---|
EP1234338A4 (en) | 2009-01-21 |
EP1234338A1 (en) | 2002-08-28 |
KR100905727B1 (ko) | 2009-07-01 |
CN100431173C (zh) | 2008-11-05 |
US6844025B2 (en) | 2005-01-18 |
US20040151887A1 (en) | 2004-08-05 |
EP1234338B1 (en) | 2015-03-25 |
WO2001039276A1 (en) | 2001-05-31 |
HK1086667A1 (en) | 2006-09-22 |
US20070045661A1 (en) | 2007-03-01 |
US7026041B2 (en) | 2006-04-11 |
US20080176098A1 (en) | 2008-07-24 |
US20050136232A1 (en) | 2005-06-23 |
CN1399797A (zh) | 2003-02-26 |
US20020197462A1 (en) | 2002-12-26 |
KR20020066400A (ko) | 2002-08-16 |
EP2400554A1 (en) | 2011-12-28 |
CN1207793C (zh) | 2005-06-22 |
ES2535362T3 (es) | 2015-05-08 |
US7205585B2 (en) | 2007-04-17 |
US6451415B1 (en) | 2002-09-17 |
AU1609601A (en) | 2001-06-04 |
US6692820B2 (en) | 2004-02-17 |
US20100307555A1 (en) | 2010-12-09 |
JP2003515933A (ja) | 2003-05-07 |
CN1722472A (zh) | 2006-01-18 |
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