JP6174803B2 - 共重合体およびこれを含む有機太陽電池 - Google Patents
共重合体およびこれを含む有機太陽電池 Download PDFInfo
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- JP6174803B2 JP6174803B2 JP2016531568A JP2016531568A JP6174803B2 JP 6174803 B2 JP6174803 B2 JP 6174803B2 JP 2016531568 A JP2016531568 A JP 2016531568A JP 2016531568 A JP2016531568 A JP 2016531568A JP 6174803 B2 JP6174803 B2 JP 6174803B2
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- 229920001577 copolymer Polymers 0.000 title claims description 101
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- 125000004432 carbon atom Chemical group C* 0.000 claims description 13
- 125000000623 heterocyclic group Chemical group 0.000 claims description 12
- 229910052760 oxygen Inorganic materials 0.000 claims description 12
- 125000001424 substituent group Chemical group 0.000 claims description 11
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- KKRPPVXJVZKJON-UHFFFAOYSA-N trimethyl-(5-trimethylstannylthiophen-2-yl)stannane Chemical compound C[Sn](C)(C)C1=CC=C([Sn](C)(C)C)S1 KKRPPVXJVZKJON-UHFFFAOYSA-N 0.000 description 15
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- UJOBWOGCFQCDNV-UHFFFAOYSA-N 9H-carbazole Chemical compound C1=CC=C2C3=CC=CC=C3NC2=C1 UJOBWOGCFQCDNV-UHFFFAOYSA-N 0.000 description 4
- 0 C(C[C@]1C(C2)C2CC1)*C1CCCC1 Chemical compound C(C[C@]1C(C2)C2CC1)*C1CCCC1 0.000 description 4
- XXMOZDBOAIICDA-UHFFFAOYSA-N [4,8-bis(2-ethylhexoxy)-2-trimethylstannylthieno[2,3-f][1]benzothiol-6-yl]-trimethylstannane Chemical compound CCCCC(CC)COC1=C2C=C([Sn](C)(C)C)SC2=C(OCC(CC)CCCC)C2=C1SC([Sn](C)(C)C)=C2 XXMOZDBOAIICDA-UHFFFAOYSA-N 0.000 description 4
- QARVLSVVCXYDNA-UHFFFAOYSA-N bromobenzene Chemical compound BrC1=CC=CC=C1 QARVLSVVCXYDNA-UHFFFAOYSA-N 0.000 description 4
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- 125000002347 octyl group Chemical group [H]C([*])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])C([H])([H])[H] 0.000 description 3
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- AOZLCBYWDXFKCJ-UHFFFAOYSA-N 1,3-dibromo-5-(2-ethylhexyl)thieno[3,4-c]pyrrole-4,6-dione Chemical compound S1C(Br)=C2C(=O)N(CC(CC)CCCC)C(=O)C2=C1Br AOZLCBYWDXFKCJ-UHFFFAOYSA-N 0.000 description 2
- AYBFWHPZXYPJFW-UHFFFAOYSA-N 2-(2-thiophen-2-ylethenyl)thiophene Chemical group C=1C=CSC=1C=CC1=CC=CS1 AYBFWHPZXYPJFW-UHFFFAOYSA-N 0.000 description 2
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- YXFVVABEGXRONW-UHFFFAOYSA-N Toluene Natural products CC1=CC=CC=C1 YXFVVABEGXRONW-UHFFFAOYSA-N 0.000 description 2
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- 125000004435 hydrogen atom Chemical group [H]* 0.000 description 2
- AWJUIBRHMBBTKR-UHFFFAOYSA-N isoquinoline Chemical compound C1=NC=CC2=CC=CC=C21 AWJUIBRHMBBTKR-UHFFFAOYSA-N 0.000 description 2
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- 125000001973 tert-pentyl group Chemical group [H]C([H])([H])C([H])([H])C(*)(C([H])([H])[H])C([H])([H])[H] 0.000 description 2
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- SYUVAXDZVWPKSI-UHFFFAOYSA-N tributyl(phenyl)stannane Chemical compound CCCC[Sn](CCCC)(CCCC)C1=CC=CC=C1 SYUVAXDZVWPKSI-UHFFFAOYSA-N 0.000 description 2
- DTJBEISROOTMQK-UHFFFAOYSA-N trimethyl-(5-trimethylstannylselenophen-2-yl)stannane Chemical compound C[Sn](C)(C)C1=CC=C([Sn](C)(C)C)[se]1 DTJBEISROOTMQK-UHFFFAOYSA-N 0.000 description 2
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- BCMCBBGGLRIHSE-UHFFFAOYSA-N 1,3-benzoxazole Chemical compound C1=CC=C2OC=NC2=C1 BCMCBBGGLRIHSE-UHFFFAOYSA-N 0.000 description 1
- GSGMEQUXTCYOAU-UHFFFAOYSA-N 1,3-dibromo-5-octylthieno[3,4-c]pyrrole-4,6-dione Chemical compound S1C(Br)=C2C(=O)N(CCCCCCCC)C(=O)C2=C1Br GSGMEQUXTCYOAU-UHFFFAOYSA-N 0.000 description 1
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- NTYDMFCZXBCEJY-UHFFFAOYSA-N 1-methyl-2-phenylcyclohexa-2,4-dien-1-amine Chemical compound CC1(N)CC=CC=C1C1=CC=CC=C1 NTYDMFCZXBCEJY-UHFFFAOYSA-N 0.000 description 1
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- MYKQKWIPLZEVOW-UHFFFAOYSA-N 11h-benzo[a]carbazole Chemical group C1=CC2=CC=CC=C2C2=C1C1=CC=CC=C1N2 MYKQKWIPLZEVOW-UHFFFAOYSA-N 0.000 description 1
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- WONYVCKUEUULQN-UHFFFAOYSA-N 2-methyl-n-(2-methylphenyl)aniline Chemical group CC1=CC=CC=C1NC1=CC=CC=C1C WONYVCKUEUULQN-UHFFFAOYSA-N 0.000 description 1
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- 125000005916 2-methylpentyl group Chemical group 0.000 description 1
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- 125000006027 3-methyl-1-butenyl group Chemical group 0.000 description 1
- JJYPMNFTHPTTDI-UHFFFAOYSA-N 3-methylaniline Chemical compound CC1=CC=CC(N)=C1 JJYPMNFTHPTTDI-UHFFFAOYSA-N 0.000 description 1
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- MQFYUZCANYLWEI-UHFFFAOYSA-N 4-methylnaphthalen-1-amine Chemical compound C1=CC=C2C(C)=CC=C(N)C2=C1 MQFYUZCANYLWEI-UHFFFAOYSA-N 0.000 description 1
- ZCYVEMRRCGMTRW-UHFFFAOYSA-N 7553-56-2 Chemical compound [I] ZCYVEMRRCGMTRW-UHFFFAOYSA-N 0.000 description 1
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- QXDWMAODKPOTKK-UHFFFAOYSA-N 9-methylanthracen-1-amine Chemical compound C1=CC(N)=C2C(C)=C(C=CC=C3)C3=CC2=C1 QXDWMAODKPOTKK-UHFFFAOYSA-N 0.000 description 1
- PAYRUJLWNCNPSJ-UHFFFAOYSA-N Aniline Chemical compound NC1=CC=CC=C1 PAYRUJLWNCNPSJ-UHFFFAOYSA-N 0.000 description 1
- ROFVEXUMMXZLPA-UHFFFAOYSA-N Bipyridyl Chemical group N1=CC=CC=C1C1=CC=CC=N1 ROFVEXUMMXZLPA-UHFFFAOYSA-N 0.000 description 1
- WKBOTKDWSSQWDR-UHFFFAOYSA-N Bromine atom Chemical compound [Br] WKBOTKDWSSQWDR-UHFFFAOYSA-N 0.000 description 1
- OYPRJOBELJOOCE-UHFFFAOYSA-N Calcium Chemical compound [Ca] OYPRJOBELJOOCE-UHFFFAOYSA-N 0.000 description 1
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- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- MYMOFIZGZYHOMD-UHFFFAOYSA-N Dioxygen Chemical compound O=O MYMOFIZGZYHOMD-UHFFFAOYSA-N 0.000 description 1
- PXGOKWXKJXAPGV-UHFFFAOYSA-N Fluorine Chemical compound FF PXGOKWXKJXAPGV-UHFFFAOYSA-N 0.000 description 1
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- 238000003747 Grignard reaction Methods 0.000 description 1
- DGAQECJNVWCQMB-PUAWFVPOSA-M Ilexoside XXIX Chemical compound C[C@@H]1CC[C@@]2(CC[C@@]3(C(=CC[C@H]4[C@]3(CC[C@@H]5[C@@]4(CC[C@@H](C5(C)C)OS(=O)(=O)[O-])C)C)[C@@H]2[C@]1(C)O)C)C(=O)O[C@H]6[C@@H]([C@H]([C@@H]([C@H](O6)CO)O)O)O.[Na+] DGAQECJNVWCQMB-PUAWFVPOSA-M 0.000 description 1
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical compound [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 1
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Description
aおよびbは各々1〜3の整数であり、
aが2以上である場合、2以上のL1は互いに同一であるかまたは異なり、
bが2以上である場合、2以上のL2は互いに同一であるかまたは異なり、
L1およびL2は互いに同一であるかまたは異なり、各々独立して共役構造であり、
R1およびR2は互いに同一であるかまたは異なり、各々独立して、前記L1およびL2の共役構造に置換される置換基として、水素;重水素;ハロゲン基;ニトリル基;ニトロ基;イミド基;アミド基;ヒドロキシ基;置換もしくは非置換のアルキル基;置換もしくは非置換のシクロアルキル基;置換もしくは非置換のアルコキシ基;置換もしくは非置換のアリールオキシ基;置換もしくは非置換のアルキルチオキシ基;置換もしくは非置換のアリールチオキシ基;置換もしくは非置換のアルキルスルホキシ基;置換もしくは非置換のアリールスルホキシ基;置換もしくは非置換のアルケニル基;置換もしくは非置換のシリル基;置換もしくは非置換のホウ素基;置換もしくは非置換のアルキルアミン基;置換もしくは非置換のアラルキルアミン基;置換もしくは非置換のアリールアミン基;置換もしくは非置換のヘテロアリールアミン基;置換もしくは非置換のアリール基;およびN、OおよびS原子のうち1つ以上を含む置換もしくは非置換の複素環基からなる群から1または2以上が選択され、
X1およびX2は互いに同一であるかまたは異なり、各々独立してCRR’、NR、O、SiRR’、PR、S、GeRR’、SeまたはTeであり、
R、R’およびR3〜R5は互いに同一であるかまたは異なり、各々独立して水素;重水素;ハロゲン基;ニトリル基;ニトロ基;イミド基;アミド基;ヒドロキシ基;置換もしくは非置換のアルキル基;置換もしくは非置換のシクロアルキル基;置換もしくは非置換のアルコキシ基;置換もしくは非置換のアリールオキシ基;置換もしくは非置換のアルキルチオキシ基;置換もしくは非置換のアリールチオキシ基;置換もしくは非置換のアルキルスルホキシ基;置換もしくは非置換のアリールスルホキシ基;置換もしくは非置換のアルケニル基;置換もしくは非置換のシリル基;置換もしくは非置換のホウ素基;置換もしくは非置換のアルキルアミン基;置換もしくは非置換のアラルキルアミン基;置換もしくは非置換のアリールアミン基;置換もしくは非置換のヘテロアリールアミン基;置換もしくは非置換のアリール基;またはN、OおよびS原子のうち1つ以上を含む置換もしくは非置換の複素環基である。
a、b、L1、L2、X1、X2およびR1〜R5は前記で定義したものと同様であり、
X1’は前記X1と同一であるかまたは異なり、各々独立してX1の定義と同様であり、
R3’は前記R3と同一であるかまたは異なり、各々独立してR3の定義と同様であり、
lはモル分率で、0<l<1であり、
mはモル分率で、0<m<1であり、
l+m=1であり、
0<o<1,000の整数である。
また1つの一実施状態において、前記X1’はSである。
また1つの一実施状態において、前記R1は置換もしくは非置換のアルキル基である。
また1つの実施状態において、前記R1は置換もしくは非置換の分枝鎖のアルキル基である。
また1つの一実施状態において、前記R1は2−エチルヘキシルオキシ基である。
また1つの実施状態において、前記R2は置換または分枝鎖のアルキル基である。
また1つの実施状態において、前記R2は2−エチルヘキシル基である。
また1つの実施状態において、前記R2は分枝鎖のアルコキシ基である。
また1つの実施状態において、前記R3は直鎖のアルキル基である。
また1つの実施状態において、R3’は直鎖のアルキル基である。
また1つの実施状態において、R3’はオクチル基である。
また1つの実施状態において、R5は水素である。
また1つの実施状態において、前記L1はフェニレン基である。
また1つの実施状態において、前記L1はS原子中1以上を含む2価の芳香族複素環基である。
また1つの一実施状態において、前記L1はチオフェン基である。
また1つの実施状態において、前記L2はフェニレン基である。
また1つの実施状態において、前記L2はS原子中1以上を含む2価の芳香族複素環基である。
また1つの一実施状態において、前記L2はチオフェン基である。
また1つの実施状態において、mは0.5である。
「実験例1.有機太陽電池の製造−1」
前記実施例1で製造した共重合体1とPC61BMを1:2でクロロベンゼン(Chlorobenzene、CB)に溶かして複合溶液(composit solution)を製造した。この時、濃度は4.0wt%に調節し、有機太陽電池はITO/PEDOT:PSS/光活性層/Alの構造にした。ITOがコーティングされたガラス基板は蒸留水、アセトン、2−プロパノールを用いて超音波洗浄し、ITO表面を10分間オゾン処理した後、45nm厚さでPEDOT:PSS(baytrom P)をスピンコーティングして120℃で10分間熱処理した。光活性層のコーティングのためには、共重合体1−PC61BM複合溶液を0.45μmPP注射器フィルター(syringe filter)で濾過した後にスピンコーティングし、3×10−8torr真空下で熱蒸発器(thermal evaporator)を利用して200nm厚さでAlを蒸着し、有機太陽電池を製造した。
前記実施例2で製造した共重合体2とPC61BMを1:2でクロロベンゼン(Chlorobenzene、CB)に溶かして複合溶液(composit solution)を製造した。この時、濃度は4.0wt%に調節し、有機太陽電池はITO/PEDOT:PSS/光活性層/Alの構造にした。ITOがコーティングされたガラス基板は蒸留水、アセトン、2−プロパノールを用いて超音波洗浄し、ITO表面を10分間オゾン処理した後、45nm厚さでPEDOT:PSS(baytrom P)をスピンコーティングして120℃で10分間熱処理した。光活性層のコーティングのためには、共重合体2−PC61BM複合溶液を0.45μmPP注射器フィルター(syringe filter)で濾過した後にスピンコーティングし、3×10−8torr真空下で熱蒸発器(thermal evaporator)を利用して200nm厚さでAlを蒸着し、有機太陽電池を製造した。
前記実施例3で製造した共重合体3とPC61BMを1:2でクロロベンゼン(Chlorobenzene、CB)に溶かして複合溶液(composit solution)を製造した。この時、濃度は4.0wt%に調節し、有機太陽電池はITO/PEDOT:PSS/光活性層/Alの構造にした。ITOがコーティングされたガラス基板は蒸留水、アセトン、2−プロパノールを用いて超音波洗浄し、ITO表面を10分間オゾン処理した後、45nm厚さでPEDOT:PSS(baytrom P)をスピンコーティングして120℃で10分間熱処理した。光活性層のコーティングのためには、共重合体3−PC61BM複合溶液を0.45μmPP注射器フィルター(syringe filter)で濾過した後にスピンコーティングし、3×10−8torr真空下で熱蒸発器(thermal evaporator)を利用して200nm厚さでAlを蒸着し、有機太陽電池を製造した。
前記実施例4で製造した共重合体4とPC61BMを1:2でクロロベンゼン(Chlorobenzene、CB)に溶かして複合溶液(composit solution)を製造した。この時、濃度は4.0wt%に調節し、有機太陽電池はITO/PEDOT:PSS/光活性層/Alの構造にした。ITOがコーティングされたガラス基板は蒸留水、アセトン、2−プロパノールを用いて超音波洗浄し、ITO表面を10分間オゾン処理した後、45nm厚さでPEDOT:PSS(baytrom P)をスピンコーティングして120℃で10分間熱処理した。光活性層のコーティングのためには、共重合体4−PC61BM複合溶液を0.45μmPP注射器フィルター(syringe filter)で濾過した後にスピンコーティングし、3×10−8torr真空下で熱蒸発器(thermal evaporator)を利用して200nm厚さでAlを蒸着し、有機太陽電池を製造した。
前記実施例5で製造した共重合体5とPC61BMを1:2でクロロベンゼン(Chlorobenzene、CB)に溶かして複合溶液(composit solution)を製造した。この時、濃度は4.0wt%に調節し、有機太陽電池はITO/PEDOT:PSS/光活性層/Alの構造にした。ITOがコーティングされたガラス基板は蒸留水、アセトン、2−プロパノールを用いて超音波洗浄し、ITO表面を10分間オゾン処理した後、45nm厚さでPEDOT:PSS(baytrom P)をスピンコーティングして120℃で10分間熱処理した。光活性層のコーティングのためには、共重合体5−PC61BM複合溶液を0.45μmPP注射器フィルター(syringe filter)で濾過した後にスピンコーティングし、3×10−8torr真空下で熱蒸発器(thermal evaporator)を利用して200nm厚さでAlを蒸着し、有機太陽電池を製造した。
前記比較例1で製造した共重合体6とPC61BMを1:2でクロロベンゼン(Chlorobenzene、CB)に溶かして複合溶液(composit solution)を製造した。この時、濃度は4.0wt%に調節し、有機太陽電池はITO/PEDOT:PSS/光活性層/Alの構造にした。ITOがコーティングされたガラス基板は蒸留水、アセトン、2−プロパノールを用いて超音波洗浄し、ITO表面を10分間オゾン処理した後、45nm厚さでPEDOT:PSS(baytrom P)をスピンコーティングして120℃で10分間熱処理した。光活性層のコーティングのためには、共重合体6−PC61BM複合溶液を0.45μmPP注射器フィルター(syringe filter)で濾過した後にスピンコーティングし、3×10−8torr真空下で熱蒸発器(thermal evaporator)を利用して200nm厚さでAlを蒸着し、有機太陽電池を製造した。
前記比較例2で製造した共重合体7とPC61BMを1:2でクロロベンゼン(Chlorobenzene、CB)に溶かして複合溶液(composit solution)を製造した。この時、濃度は4.0wt%に調節し、有機太陽電池はITO/PEDOT:PSS/光活性層/Alの構造にした。ITOがコーティングされたガラス基板は蒸留水、アセトン、2−プロパノールを用いて超音波洗浄し、ITO表面を10分間オゾン処理した後、45nm厚さでPEDOT:PSS(baytrom P)をスピンコーティングして120℃で10分間熱処理した。光活性層のコーティングのためには、共重合体7−PC61BM複合溶液を0.45μmPP注射器フィルター(syringe filter)で濾過した後にスピンコーティングし、3×10−8torr真空下で熱蒸発器(thermal evaporator)を利用して200nm厚さでAlを蒸着し、有機太陽電池を製造した。
前記比較例3で製造した共重合体8とPC61BMを1:2でクロロベンゼン(Chlorobenzene、CB)に溶かして複合溶液(composit solution)を製造した。この時、濃度は4.0wt%に調節し、有機太陽電池はITO/PEDOT:PSS/光活性層/Alの構造にした。ITOがコーティングされたガラス基板は蒸留水、アセトン、2−プロパノールを用いて超音波洗浄し、ITO表面を10分間オゾン処理した後、45nm厚さでPEDOT:PSS(baytrom P)をスピンコーティングして120℃で10分間熱処理した。光活性層のコーティングのためには、共重合体8−PC61BM複合溶液を0.45μmPP注射器フィルター(syringe filter)で濾過した後にスピンコーティングし、3×10−8torr真空下で熱蒸発器(thermal evaporator)を利用して200nm厚さでAlを蒸着し、有機太陽電池を製造した。
前記比較例3で製造した共重合体8とPC61BMを1:3でクロロベンゼン(Chlorobenzene、CB)に溶かして複合溶液(composit solution)を製造した。この時、濃度は4.0wt%に調節し、有機太陽電池はITO/PEDOT:PSS/光活性層/Alの構造にした。ITOがコーティングされたガラス基板は蒸留水、アセトン、2−プロパノールを用いて超音波洗浄し、ITO表面を10分間オゾン処理した後、45nm厚さでPEDOT:PSS(baytrom P)をスピンコーティングして120℃で10分間熱処理した。光活性層のコーティングのためには、共重合体8−PC61BM複合溶液を0.45μmPP注射器フィルター(syringe filter)で濾過した後にスピンコーティングし、3×10−8torr真空下で熱蒸発器(thermal evaporator)を利用して200nm厚さでAlを蒸着し、有機太陽電池を製造した。
前記比較例4で製造した共重合体9とPC61BMを1:2でクロロベンゼン(Chlorobenzene、CB)に溶かして複合溶液(composit solution)を製造した。この時、濃度は4.0wt%に調節し、有機太陽電池はITO/PEDOT:PSS/光活性層/Alの構造にした。ITOがコーティングされたガラス基板は蒸留水、アセトン、2−プロパノールを用いて超音波洗浄し、ITO表面を10分間オゾン処理した後、45nm厚さでPEDOT:PSS(baytrom P)をスピンコーティングして120℃で10分間熱処理した。光活性層のコーティングのためには、共重合体9−PC61BM複合溶液を0.45μmPP注射器フィルター(syringe filter)で濾過した後にスピンコーティングし、3×10−8torr真空下で熱蒸発器(thermal evaporator)を利用して200nm厚さでAlを蒸着し、有機太陽電池を製造した。
前記実験例1〜5および比較実験例1〜5で製造された有機太陽電池の光電変換特性を100mW/cm2(AM1.5)条件で測定し、下記表1にその結果を示す。
102 ・・・第1電極
103 ・・・正孔輸送層
104 ・・・光活性層
105 ・・・第2電極
Claims (14)
- 下記化学式1で表される第1単位、
下記化学式2で表される第2単位、および
下記化学式3で表される第3単位を含む共重合体:
aおよびbは各々1〜3の整数であり、
aが2以上である場合、2以上のL1は互いに同一であるかまたは異なり、
bが2以上である場合、2以上のL2は互いに同一であるかまたは異なり、
L1およびL2は互いに同一であるかまたは異なり、各々独立して、アリーレン基;N、O、S、Se、Te、GeおよびP原子のうち1つ以上を含む芳香族複素環基;または1または2以上のビニレン基を含む共役構造であり、
R1およびR2は互いに同一であるかまたは異なり、各々独立して、前記L1およびL2の共役構造に置換される置換基として、水素;重水素;ハロゲン基;ニトリル基;ニトロ基;イミド基;アミド基;ヒドロキシ基;置換もしくは非置換のアルキル基;置換もしくは非置換のシクロアルキル基;置換もしくは非置換のアルコキシ基;置換もしくは非置換のアリールオキシ基;置換もしくは非置換のアルキルチオキシ基;置換もしくは非置換のアリールチオキシ基;置換もしくは非置換のアルキルスルホキシ基;置換もしくは非置換のアリールスルホキシ基;置換もしくは非置換のアルケニル基;置換もしくは非置換のシリル基;置換もしくは非置換のホウ素基;置換もしくは非置換のアルキルアミン基;置換もしくは非置換のアラルキルアミン基;置換もしくは非置換のアリールアミン基;置換もしくは非置換のヘテロアリールアミン基;置換もしくは非置換のアリール基;およびN、OおよびS原子のうち1つ以上を含む置換もしくは非置換の複素環基からなる群から1または2以上が選択され、
X1およびX2は互いに同一であるかまたは異なり、各々独立してCRR’、NR、O、SiRR’、PR、S、GeRR’、SeまたはTeであり、
R、R’およびR3〜R5は互いに同一であるかまたは異なり、各々独立して水素;重水素;ハロゲン基;ニトリル基;ニトロ基;イミド基;アミド基;ヒドロキシ基;置換もしくは非置換のアルキル基;置換もしくは非置換のシクロアルキル基;置換もしくは非置換のアルコキシ基;置換もしくは非置換のアリールオキシ基;置換もしくは非置換のアルキルチオキシ基;置換もしくは非置換のアリールチオキシ基;置換もしくは非置換のアルキルスルホキシ基;置換もしくは非置換のアリールスルホキシ基;置換もしくは非置換のアルケニル基;置換もしくは非置換のシリル基;置換もしくは非置換のホウ素基;置換もしくは非置換のアルキルアミン基;置換もしくは非置換のアラルキルアミン基;置換もしくは非置換のアリールアミン基;置換もしくは非置換のヘテロアリールアミン基;置換もしくは非置換のアリール基;またはN、OおよびS原子のうち1つ以上を含む置換もしくは非置換の複素環基であり、
前記共重合体は下記化学式4で表される単位を含む:
a、b、L1、L2、X1、X2およびR1〜R5は上記で定義したものと同様であり、
X1’は前記X1と同一であるかまたは異なり、各々独立してX1の定義と同様であり、
R3’は前記R3と同一であるかまたは異なり、各々独立してR3の定義と同様であり、
lはモル分率で、0<l<1であり、
mはモル分率で、0<m<1であり、
l+m=1であり、
0<o<1,000の整数である。 - R1およびR2は互いに同一であるかまたは異なり、各々独立して置換もしくは非置換の炭素数1〜20の直鎖もしくは分枝鎖のアルキル基;または置換もしくは非置換の炭素数1〜20の直鎖もしくは分枝鎖のアルコキシ基である、請求項1に記載の共重合体。
- R3〜R5は互いに同一であるかまたは異なり、各々独立して水素;または置換もしくは非置換の炭素数1〜20の直鎖もしくは分枝鎖のアルキル基である、請求項1に記載の共重合体。
- 前記第1単位、第2単位および第3単位のモル数の和に対し、前記第1単位と第3単位の和のモル比は0.5以上である、請求項1に記載の共重合体。
- 前記共重合体の数平均分子量は500g/mol〜1,000,000g/molである、請求項1に記載の共重合体。
- 前記共重合体の分子量分布は1〜100である、請求項1に記載の共重合体。
- 前記共重合体はランダム共重合体である、請求項1に記載の共重合体。
- 第1電極、前記第1電極と対向して備えられる第2電極、および前記第1電極と前記第2電極との間に備えられ、光活性層を含む1層以上の有機物層を含み、前記有機物層のうち1層以上は請求項1〜7のいずれか1項に記載の共重合体を含む有機太陽電池。
- 前記有機物層は正孔輸送層、正孔注入層または正孔輸送と正孔注入を同時にする層を含み、
前記正孔輸送層、正孔注入層または正孔輸送と正孔注入を同時にする層は前記共重合体を含む、請求項8に記載の有機太陽電池。 - 前記有機物層は電子注入層、電子輸送層または電子注入と電子輸送を同時にする層を含み、
前記電子注入層、電子輸送層または電子注入と電子輸送を同時にする層は前記共重合体を含む、請求項8に記載の有機太陽電池。 - 前記光活性層は電子供与体および電子受容体からなる群から選択される1または2以上を含み、
前記電子供与体は前記共重合体を含む、請求項8に記載の有機太陽電池。 - 前記電子供与体および電子受容体はバルクヘテロ接合(BHJ)を構成する、請求項11に記載の有機太陽電池。
- 前記光活性層はn型有機物層およびp型有機物層を含む2層薄膜(bilayer)構造であり、
前記p型有機物層は前記共重合体を含む、請求項8に記載の有機太陽電池。 - 前記有機太陽電池は、正孔注入層、正孔輸送層、正孔遮断層、電荷発生層、電子遮断層、電子注入層および電子輸送層からなる群から選択される1または2以上の有機物層をさらに含む、請求項8に記載の有機太陽電池。
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