JP2015097259A - 光電変換素子 - Google Patents
光電変換素子 Download PDFInfo
- Publication number
- JP2015097259A JP2015097259A JP2014201779A JP2014201779A JP2015097259A JP 2015097259 A JP2015097259 A JP 2015097259A JP 2014201779 A JP2014201779 A JP 2014201779A JP 2014201779 A JP2014201779 A JP 2014201779A JP 2015097259 A JP2015097259 A JP 2015097259A
- Authority
- JP
- Japan
- Prior art keywords
- photoelectric conversion
- conversion element
- dye molecule
- independently
- dye
- 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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- 239000004065 semiconductor Substances 0.000 claims abstract description 80
- 239000003792 electrolyte Substances 0.000 claims abstract description 19
- 239000007787 solid Substances 0.000 claims abstract description 13
- 239000000126 substance Substances 0.000 claims description 30
- 125000004432 carbon atom Chemical group C* 0.000 claims description 17
- 125000000217 alkyl group Chemical group 0.000 claims description 13
- XEEYBQQBJWHFJM-UHFFFAOYSA-N Iron Chemical compound [Fe] XEEYBQQBJWHFJM-UHFFFAOYSA-N 0.000 claims description 9
- 125000002947 alkylene group Chemical group 0.000 claims description 8
- 125000004435 hydrogen atom Chemical group [H]* 0.000 claims description 8
- 125000003710 aryl alkyl group Chemical group 0.000 claims description 4
- 125000003118 aryl group Chemical group 0.000 claims description 4
- 125000001511 cyclopentyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C1([H])[H] 0.000 claims description 4
- 125000000113 cyclohexyl group Chemical group [H]C1([H])C([H])([H])C([H])([H])C([H])(*)C([H])([H])C1([H])[H] 0.000 claims description 3
- 150000001450 anions Chemical class 0.000 claims description 2
- 125000002029 aromatic hydrocarbon group Chemical group 0.000 claims description 2
- XDTMQSROBMDMFD-UHFFFAOYSA-N Cyclohexane Chemical compound C1CCCCC1 XDTMQSROBMDMFD-UHFFFAOYSA-N 0.000 claims 1
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Abstract
Description
[項目1]
光アノードと、対極と、前記光アノードと前記対極との間に設けられた電解質媒体とを有し、
前記光アノードは、色素分子を含む固体半導体層を有し、
前記色素分子は、下記の化学式(1)で表されるXDと下記の化学式(2)で表されるYAとを分子内に有し、
前記色素分子内におけるXDの数のYAの数に対する比であるR(XD/YA)は2以上である、光電変換素子。
[項目2]
R(XD/YA)は4以下である、項目1記載の光電変換素子。
[項目3]
YAを間に介して互いに連結された2つのXDを含む、項目1または2に記載の光電変換素子。
[項目4]
前記色素分子は、分子内にYAを1つだけ有する、項目1から3のいずれかに記載の光電変換素子。
[項目5]
前記色素分子において、YAとDAとの間に存在する炭素原子の数は2以下である、項目1から4のいずれかに記載の光電変換素子。
[項目6]
前記色素分子は、下記の一般式(I)で示され、
一般式(I)において、Ar1およびAr2は、それぞれ独立に芳香族炭化水素残基を示し、R1とR2はそれぞれ独立に水素原子またはアルキル基を示し、または、R1とR2が連結して、シクロペンタン環またはシクロヘキサン環を形成し、R3とR4はそれぞれ独立に水素原子またはアルキル基を示し、または、R3とR4が連結して、シクロペンタン環またはシクロヘキサン環を形成し、Q1およびQ2は、二価の電子吸引性有機残基を示し、L1とL2は、それぞれ独立にアルキレン基を示し、X-は対アニオンを示す、項目1から5のいずれかに記載の光電変換素子。
[項目7]
Q1とQ2は、それぞれ独立に、下記の一般式(II)、(III)、(IV)、(V)および(VI)のいずれかで示される、二価の電子吸引性有機残基である、項目6に記載の光電変換素子。
但し、前記一般式中のR5、R7、R10、R12およびR15は、それぞれ独立に水素原子またはアルキル基であり、R6、R9、R11およびR14は、それぞれ独立にアルキレン基であり、R8、R13、R16、R17は、それぞれ独立にアルキル基、アラルキル基またはアリール基である。
[項目8]
R5、R7、R10、R12およびR15は、それぞれ独立に水素原子または炭素数が1以上4以下のアルキル基であり、R6、R9、R11およびR14は、それぞれ独立に炭素数が1以上3以下のアルキレン基であり、R8、R13、R16、R17は、それぞれ独立に炭素数が1以上4以下のアルキル基、炭素数が7以上14以下のアラルキル基または炭素数が6以上14以下のアリール基である、項目7に記載の光電変換素子。
[項目9]
L1およびL2は、それぞれ独立に炭素数が2以上10以下のアルキレン基である、項目6から8のいずれかに記載の光電変換素子。
以下、図面を参照して、本開示の実施形態を説明する。
光アノード15は、光電変換素子100の負極として機能する。光アノード15は、上述したように、例えば、可視光を透過する導電層14と、導電層14上に形成された半導体層16を有し、半導体層16は色素分子16DAを含んでいる。色素分子16DAを含む半導体層16は、光吸収層と呼ばれることもある。このとき、基板12は、例えば、可視光を透過するガラス基板またはプラスチック基板(プラスチックフィルムを含む)である。
対極35は、光電変換素子100の正極として機能する。対極35を形成する材料としては、例えば、白金、金、銀、銅、アルミニウム、ロジウム、インジウム等の金属、グラファイト、カーボンナノチューブ、白金を担持したカーボン等の炭素材料、インジウム−錫複合酸化物、アンチモンをドープした酸化錫、フッ素をドープした酸化錫等の導電性金属酸化物、ポリエチレンジオキシチオフェン、ポリピロール、ポリアニリン等の導電性高分子などを挙げることができる。これらのうち、白金、グラファイト、ポリエチレンジオキシチオフェンなどが好ましい。
電解質媒体22としては、酸化還元物質(メディエータ)を溶媒中に溶解させた電解質溶液の他、ゲル電解質または高分子電解質、さらには、溶融塩のような固体電解質、ヨウ化銅などp型半導体、トリフェニルアミン等のアミン誘導体や、ポリアセチレン、ポリアニリン、ポリチオフェン等の導電性高分子などを用いることができる。
図1(a)に示した光電変換素子100と実質的に同じ構造を有する光電変換素子を作製した。各構成要素は、以下の通りである。
基板12:ガラス基板 厚さ1mm
透明導電層14:フッ素ドープSnO2層(表面抵抗10Ω/□)
半導体層16:多孔質酸化チタン、色素分子
電解質溶液22:2,2,6,6−テトラメチルピペリジン−1−オキシルを1M、リチウムビストリフルオロメタンスルホニルイミド(LiTFSI)を0.5M、N−メチルベンズイミダゾールを1.6Mの濃度で含有する、アセトニトリル溶液(1M=1mol/L)
基板52:ガラス基板 厚さ1mm
酸化物導電層34:フッ素ドープSnO2層(表面抵抗10Ω/□)
対極35:白金層
色素分子として下記の化学式(18)で示されるD1を用いた以外は、色素分子の濃度を含め、実施例1と同様にして、比較例1の光学変換素子を得た。比較例1の光電変換素子の色素分子は、ドナー部(XD)を有し、アクセプター部(YA)を有していない。
色素分子として下記の化学式(19)で示されるD1Vを用いた以外は、実施例1と同様にして、比較例2の光学変換素子を得た。比較例2の光電変換素子の色素分子は、1つのドナー部(XD)と1つのアクセプター部(YA)とを有する。
14 透明導電層
15 光アノード
16 光増感剤を含む半導体層
22 電解質媒体(電解質溶液)
34 酸化物導電層(透明導電層)
35 対極
36 金属層(白金層)
52 基板
100 光電変換素子
Claims (9)
- R(XD/YA)は4以下である、請求項1に記載の光電変換素子。
- YAを間に介して互いに連結された2つのXDを含む、請求項1または2に記載の光電変換素子。
- 前記色素分子は、分子内にYAを1つだけ有する、請求項1から3のいずれかに記載の光電変換素子。
- 前記色素分子において、YAとDAとの間に存在する炭素原子の数は2以下である、請求項1から4のいずれかに記載の光電変換素子。
- R5、R7、R10、R12およびR15は、それぞれ独立に水素原子または炭素数が1以上4以下のアルキル基であり、R6、R9、R11およびR14は、それぞれ独立に炭素数が1以上3以下のアルキレン基であり、R8、R13、R16、R17は、それぞれ独立に炭素数が1以上4以下のアルキル基、炭素数が7以上14以下のアラルキル基または炭素数が6以上14以下のアリール基である、請求項7に記載の光電変換素子。
- L1およびL2は、それぞれ独立に炭素数が2以上10以下のアルキレン基である、請求項6から8のいずれかに記載の光電変換素子。
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WO2012060346A1 (ja) * | 2010-11-01 | 2012-05-10 | パナソニック株式会社 | 光電気素子、光電気素子の製造方法、及び光増感剤 |
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