[논문]Efficient small molecular organic light emitting diode with graphene cathode covered by a Sm layer with nano-hollows and n-doped by Bphen:Cs2CO3 in the hollows

Yao, Li; Li, Lei; Qin, Laixiang; Ma, Yaoguang; Wang, Wei; Meng, Hu; Jin, Weifeng; Wang, Yilun; Xu, Wanjin; Ran, Guangzhao; You, Liping; Qin, Guogang

doi:10.1088/1361-6528/aa55e5

Efficient small molecular organic light emitting diode with graphene cathode covered by a Sm layer with nano-hollows and n-doped by Bphen:Cs2CO3 in the hollows

Nanotechnology, v.28 no.10, 2017년, pp.105201 -

Yao, Li (State Key Laboratory for Microscopic Physics, School of Physics, Peking University, Beijing 100871, People’s Republic of China) , Li, Lei (State Key Laboratory for Microscopic Physics, School of Physics, Peking University, Beijing 100871, People’s Republic of China) , Qin, Laixiang (State Key Laboratory for Microscopic Physics, School of Physics, Peking University, Beijing 100871, People’s Republic of China) , Ma, Yaoguang (State Key Laboratory for Microscopic Physics, School of Physics, Peking University, Beijing 100871, People’s Republic of China) , Wang, Wei (State Key Laboratory for Microscopic Physics, School of Physics, Peking University, Beijing 100871, People’s Republic of China) , Meng, Hu (State Key Laboratory for Microscopic Physics, School of Physics, Peking University, Beijing 100871, People’s Republic of China) , Jin, Weifeng (State Key Laboratory for Microscopic Physics, School of Physics, Peking University, Beijing 100871, People’s Republic of China) , Wang, Yilun (State Key Laboratory for Microscopic Physics, School of Physics, Peking University,) , Xu, Wanjin , Ran, Guangzhao , You, Liping , Qin, Guogang

Abstract ▼ AI-Helper

Graphene is a favorable candidate for electrodes of organic light emitting diodes (OLEDs). Graphene has quite a high work function of ∼4.5 eV, and has been extensively studied when used as anodes of OLEDs. In order to use graphene as a cathode, the electron injection barrier between the graphene cathode and the electron transport layer has to be low enough. Using 4,7-diphenyl-1,10-phenanthroline (Bphen):Cs2CO3 to n-dope graphene is a very good method, but the electron injection barrier between the n-doped graphene and Bphen:Cs2CO3 is still too high to be ∼1.0 eV. In this work, in order to further reduce the electron injection barrier, a novel method is suggested. On the graphene cathode, a Sm layer with a lot of nano-hollows, and subsequently a layer of Bphen:Cs2CO3, are deposited. The Bphen:Cs2CO3 can n-dope graphene in the nano-hollows, and the Fermi level of the graphene rises. The nano Sm layer is very easily oxidized. Oxygen adsorbed on the surface of graphene may react with Sm to form an O−–Sm+ dipole layer. On the areas of the Sm oxide dipole layer without nano-hollows, the electron injection barrier can be further lowered by the dipole layer. Electrons tend to mainly inject through the lower electron barrier where the dipole layer exists. Based on this idea, an effective inverted small molecular OLED with the structure of graphene/1 nm Sm layer with a lot of nano-hollows/Bphen:Cs2CO3/Alq3:C545T/NPB/MoO3/Al is presented. The maximum current efficiency and maximum power efficiency of the OLED with a 1 nm Sm layer are about two and three times of those of the reference OLED without any Sm layer, respectively.

참고문헌 (35)

[1] Bonaccorso F, Sun Z, Hasan T and Ferrari A C 2010 Graphene photonics and optoelectronics Nat. Photon. 4 611–22 10.1038/nphoton.2010.186 Graphene photonics and optoelectronics Bonaccorso F, Sun Z, Hasan T and Ferrari A C Nat. Photon. 4 2010 611 622

상세보기
[2] Castro Neto A H, Guinea F, Peres N M R, Novoselov K S and Geim A K 2009 The electronic properties of graphene Rev. Mod. Phys. 81 109–62 10.1103/RevModPhys.81.109 The electronic properties of graphene Castro Neto A H, Guinea F, Peres N M R, Novoselov K S and Geim A K Rev. Mod. Phys. 0034-6861 81 2009 109 162

상세보기
[3] Geim A K 2009 Graphene: status and prospects Science 324 1530–4 10.1126/science.1158877 Graphene: status and prospects Geim A K Science 324 2009 1530 1534

상세보기
[4] Geim A K and Novoselov K S 2007 The rise of graphene Nat. Mater. 6 183–91 10.1038/nmat1849 The rise of graphene Geim A K and Novoselov K S Nat. Mater. 6 2007 183 191

상세보기
[5] Kim K S, Zhao Y, Jang H, Lee S Y, Kim J M, Kim K S, Ahn J H, Kim P, Choi J Y and Hong B H 2009 Large-scale pattern growth of graphene films for stretchable transparent electrodes Nature 457 706–10 10.1038/nature07719 Large-scale pattern growth of graphene films for stretchable transparent electrodes Kim K S, Zhao Y, Jang H, Lee S Y, Kim J M, Kim K S, Ahn J H, Kim P, Choi J Y and Hong B H Nature 457 2009 706 710

상세보기
[6] Lee C, Wei X D, Kysar J W and Hone J 2008 Measurement of the elastic properties and intrinsic strength of monolayer graphene Science 321 385–8 10.1126/science.1157996 Measurement of the elastic properties and intrinsic strength of monolayer graphene Lee C, Wei X D, Kysar J W and Hone J Science 321 2008 385 388

상세보기
[7] Huang J H, Fang J H, Liu C C and Chu C W 2011 Effective work function modulation of graphene/carbon nanotube composite films as transparent cathodes for organic optoelectronics ACS Nano 5 6262–71 10.1021/nn201253w Effective work function modulation of graphene/carbon nanotube composite films as transparent cathodes for organic optoelectronics Huang J H, Fang J H, Liu C C and Chu C W ACS Nano 5 2011 6262 6271

상세보기
[8] Xia F, Mueller T, Lin Y M, Valdes-Garcia A and Avouris P 2009 Ultrafast graphene photodetector Nat. Nanotechnol. 4 839–43 10.1038/nnano.2009.292 Ultrafast graphene photodetector Xia F, Mueller T, Lin Y M, Valdes-Garcia A and Avouris P Nat. Nanotechnol. 4 2009 839 843

상세보기
[9] Wang Y, Tong S W, Xu X F, Ozyilmaz B and Loh K P 2011 Interface engineering of layer-by-layer stacked graphene anodes for high-performance organic solar cells Adv. Mater. 23 1514–8 10.1002/adma.201003673 Interface engineering of layer-by-layer stacked graphene anodes for high-performance organic solar cells Wang Y, Tong S W, Xu X F, Ozyilmaz B and Loh K P Adv. Mater. 23 2011 1514 1518

상세보기
[10] Han T-H, Lee Y, Choi M-R, Woo S-H, Bae S-H, Hong B H, Ahn J-H and Lee T-W 2012 Extremely efficient flexible organic light-emitting diodes with modified graphene anode Nat. Photon. 6 105–10 10.1038/nphoton.2011.318 Extremely efficient flexible organic light-emitting diodes with modified graphene anode Han T-H, Lee Y, Choi M-R, Woo S-H, Bae S-H, Hong B H, Ahn J-H and Lee T-W Nat. Photon. 6 2012 105 110

상세보기
[11] Lee S K, Jang H Y, Jang S, Choi E, Hong B H, Lee J, Park S and Ahn J H 2012 All graphene-based thin film transistors on flexible plastic substrates Nano Lett. 12 3472–6 10.1021/nl300948c All graphene-based thin film transistors on flexible plastic substrates Lee S K, Jang H Y, Jang S, Choi E, Hong B H, Lee J, Park S and Ahn J H Nano Lett. 12 2012 3472 3476

상세보기
[12] Rana K, Singh J and Ahn J-H 2014 A graphene-based transparent electrode for use in flexible optoelectronic devices J. Mater. Chem. C 2 2646 10.1039/c3tc32264e A graphene-based transparent electrode for use in flexible optoelectronic devices Rana K, Singh J and Ahn J-H J. Mater. Chem. 2 C 2014 2646

상세보기
[13] Hu Z, Zhong Z, Chen Y, Sun C, Huang F, Peng J, Wang J and Cao Y 2016 Energy-level alignment at the organic/electrode interface in organic optoelectronic devices Adv. Funct. Mater. 26 129–36 10.1002/adfm.201503420 Energy-level alignment at the organic/electrode interface in organic optoelectronic devices Hu Z, Zhong Z, Chen Y, Sun C, Huang F, Peng J, Wang J and Cao Y Adv. Funct. Mater. 26 2016 129 136

상세보기
[14] Meng H, Dai Y, Ye Y, Luo J X, Shi Z J, Dai L and Qin G G 2012 Bilayer graphene anode for small molecular organic electroluminescence J. Phys. D: Appl. Phys. 45 245103 10.1088/0022-3727/45/24/245103 Bilayer graphene anode for small molecular organic electroluminescence Meng H, Dai Y, Ye Y, Luo J X, Shi Z J, Dai L and Qin G G J. Phys. D: Appl. Phys. 0022-3727 45 24 245103 2012

상세보기
[15] Li N, Oida S, Tulevski G S, Han S J, Hannon J B, Sadana D K and Chen T C 2013 Efficient and bright organic light-emitting diodes on single-layer graphene electrodes Nat. Commun. 4 2294 10.1038/ncomms3294 Efficient and bright organic light-emitting diodes on single-layer graphene electrodes Li N, Oida S, Tulevski G S, Han S J, Hannon J B, Sadana D K and Chen T C Nat. Commun. 4 2013 2294

상세보기
[16] Kim D, Lee D, Lee Y and Jeon D Y 2013 Work-function engineering of graphene anode by bis(trifluoromethanesulfonyl)amide doping for efficient polymer light-emitting diodes Adv. Funct. Mater. 23 5049–55 10.1002/adfm201301386 Work-function engineering of graphene anode by bis(trifluoromethanesulfonyl)amide doping for efficient polymer light-emitting diodes Kim D, Lee D, Lee Y and Jeon D Y Adv. Funct. Mater. 23 2013 5049 5055

상세보기
[17] Sun T, Wang Z L, Shi Z J, Ran G Z, Xu W J, Wang Z Y, Li Y Z, Dai L and Qin G G 2010 Multilayered graphene used as anode of organic light emitting devices Appl. Phys. Lett. 96 133301 10.1063/1.3373855 Multilayered graphene used as anode of organic light emitting devices Sun T, Wang Z L, Shi Z J, Ran G Z, Xu W J, Wang Z Y, Li Y Z, Dai L and Qin G G Appl. Phys. Lett. 96 133301 2010

상세보기
[18] Meyer J, Kidambi P R, Bayer B C, Weijtens C, Kuhn A, Centeno A, Pesquera A, Zurutuza A, Robertson J and Hofmann S 2014 Metal oxide induced charge transfer doping and band alignment of graphene electrodes for efficient organic light emitting diodes Sci. Rep. 4 5380 10.1038/srep05380 Metal oxide induced charge transfer doping and band alignment of graphene electrodes for efficient organic light emitting diodes Meyer J, Kidambi P R, Bayer B C, Weijtens C, Kuhn A, Centeno A, Pesquera A, Zurutuza A, Robertson J and Hofmann S Sci. Rep. 4 2014 5380

상세보기
[19] Wu J 2010 Organic light-emitting diodes on solution-processed graphene transparent electrodes ACS Nano 4 43–8 10.1021/nn900728d Organic light-emitting diodes on solution-processed graphene transparent electrodes Wu J ACS Nano 4 2010 43 48

상세보기
[20] Jo G et al 2010 Large-scale patterned multi-layer graphene films as transparent conducting electrodes for GaN light-emitting diodes Nanotechnology 21 175201 10.1088/0957-4484/21/17/175201 Large-scale patterned multi-layer graphene films as transparent conducting electrodes for GaN light-emitting diodes Jo G et al Nanotechnology 0957-4484 21 17 175201 2010

상세보기
[21] Hwang J O, Park J S, Choi D S, Kim J Y, Lee S H, Lee K E, Kim Y H, Song M H, Yoo S and Kim S O 2012 Workfunction-tunable, n-doped reduced graphene transparent electrodes for high-performance polymer light-emitting diodes ACS Nano 6 159–67 10.1021/nn203176u Workfunction-tunable, n-doped reduced graphene transparent electrodes for high-performance polymer light-emitting diodes Hwang J O, Park J S, Choi D S, Kim J Y, Lee S H, Lee K E, Kim Y H, Song M H, Yoo S and Kim S O ACS Nano 6 2012 159 167

상세보기
[22] Seo J T, Han J, Lim T, Lee K H, Hwang J, Yang H and Ju S 2014 Fully transparent quantum dot light-emitting diode integrated with graphene anode and cathode ACS Nano 8 12476–82 10.1021/nn505316q Fully transparent quantum dot light-emitting diode integrated with graphene anode and cathode Seo J T, Han J, Lim T, Lee K H, Hwang J, Yang H and Ju S ACS Nano 8 2014 12476 12482

상세보기
[23] Sanders S et al 2015 Engineering high charge transfer n-doping of graphene electrodes and its application to organic electronics Nanoscale 7 13135–42 10.1039/C5NR03246F Engineering high charge transfer n-doping of graphene electrodes and its application to organic electronics Sanders S et al Nanoscale 7 2015 13135 13142

상세보기
[24] Matyba P, Yamaguchi H, Eda G, Chhowalla M, Edman L and Robinson N D 2010 Graphene and mobile ions: the key to all-plastic, solution-processed light-emitting devices ACS Nano 4 637–42 10.1021/nn9018569 Graphene and mobile ions: the key to all-plastic, solution-processed light-emitting devices Matyba P, Yamaguchi H, Eda G, Chhowalla M, Edman L and Robinson N D ACS Nano 4 2010 637 642

상세보기
[25] Chang J H, Lin W H, Wang P C, Taur J I, Ku T A, Chen W T, Yan S J and Wu C I 2015 Solution-processed transparent blue organic light-emitting diodes with graphene as the top cathode Sci. Rep. 5 9693 10.1038/srep09693 Solution-processed transparent blue organic light-emitting diodes with graphene as the top cathode Chang J H, Lin W H, Wang P C, Taur J I, Ku T A, Chen W T, Yan S J and Wu C I Sci. Rep. 5 2015 9693

상세보기
[26] Chu T-Y, Chen S-Y, Chen J-F and Chen C H 2006 Ultrathin electron injection layer on indium–tin oxide bottom cathode for highly efficient inverted organic light-emitting diodes Japan. J. Appl. Phys. 45 4948–50 10.1143/JJAP.45.4948 Ultrathin electron injection layer on indium–tin oxide bottom cathode for highly efficient inverted organic light-emitting diodes Chu T-Y, Chen S-Y, Chen J-F and Chen C H Japan. J. Appl. Phys. 0021-4922 45 2006 4948 4950

상세보기
[27] Choi H W, Kim S Y, Kim W-K and Lee J-L 2005 Enhancement of electron injection in inverted top-emitting organic light-emitting diodes using an insulating magnesium oxide buffer layer Appl. Phys. Lett. 87 082102 10.1063/1.2033129 Enhancement of electron injection in inverted top-emitting organic light-emitting diodes using an insulating magnesium oxide buffer layer Choi H W, Kim S Y, Kim W-K and Lee J-L Appl. Phys. Lett. 87 082102 2005

상세보기
[28] Qin G G, Xu A G, Ma G L, Ran G Z, Qiao Y P, Zhang B R, Chen W X and Wu S K 2004 A top-emission organic light-emitting diode with a silicon anode and an Sm/Au cathode Appl. Phys. Lett. 85 5406 10.1063/1.1823601 A top-emission organic light-emitting diode with a silicon anode and an Sm/Au cathode Qin G G, Xu A G, Ma G L, Ran G Z, Qiao Y P, Zhang B R, Chen W X and Wu S K Appl. Phys. Lett. 85 2004 5406

상세보기
[29] Luo Z, Pinto N J, Davila Y and Charlie Johnson A T 2012 Controlled doping of graphene using ultraviolet irradiation Appl. Phys. Lett. 100 253108 10.1063/1.4729828 Controlled doping of graphene using ultraviolet irradiation Luo Z, Pinto N J, Davila Y and Charlie Johnson A T Appl. Phys. Lett. 100 253108 2012

상세보기
[30] Lin Y-J and Zeng J-J 2013 Tuning the work function of graphene by ultraviolet irradiation Appl. Phys. Lett. 102 183120 10.1063/1.4804289 Tuning the work function of graphene by ultraviolet irradiation Lin Y-J and Zeng J-J Appl. Phys. Lett. 102 183120 2013

상세보기
[31] Wang X, Li X, Zhang L, Yoon Y, Weber P K, Wang H, Guo J and Dai H 2009 N-doping of graphene through electrothermal reactions with ammonia Science 324 768–71 10.1126/science.1170335 N-doping of graphene through electrothermal reactions with ammonia Wang X, Li X, Zhang L, Yoon Y, Weber P K, Wang H, Guo J and Dai H Science 324 2009 768 771

상세보기
[32] Sato Y, Takai K and Enoki T 2011 Electrically controlled adsorption of oxygen in bilayer graphene devices Nano Lett. 11 3468–75 10.1021/nl202002p Electrically controlled adsorption of oxygen in bilayer graphene devices Sato Y, Takai K and Enoki T Nano Lett. 11 2011 3468 3475

상세보기
[33] Ferrari A C et al 2006 Raman spectrum of graphene and graphene layers Phys. Rev. Lett. 97 187401 10.1103/PhysRevLett.97.187401 Raman spectrum of graphene and graphene layers Ferrari A C et al Phys. Rev. Lett. 97 187401 2006

상세보기
[34] Tongay S, Berke K, Lemaitre M, Nasrollahi Z, Tanner D B, Hebard A F and Appleton B R 2011 Stable hole doping of graphene for low electrical resistance and high optical transparency Nanotechnology 22 6 10.1088/0957-4484/22/42/425701 Stable hole doping of graphene for low electrical resistance and high optical transparency Tongay S, Berke K, Lemaitre M, Nasrollahi Z, Tanner D B, Hebard A F and Appleton B R Nanotechnology 0957-4484 22 42 425701 2011 6

상세보기
[35] Kwon K C, Choi K S, Kim B J, Lee J-L and Kim S Y 2012 Work-function decrease of graphene sheet using alkali metal carbonates J. Phys. Chem. C 116 26586–91 10.1021/jp3069927 Work-function decrease of graphene sheet using alkali metal carbonates Kwon K C, Choi K S, Kim B J, Lee J-L and Kim S Y J. Phys. Chem. 1932-7447 116 C 2012 26586 26591

상세보기

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Efficient small molecular organic light emitting diode with graphene cathode covered by a Sm layer with nano-hollows and n-doped by Bphen:Cs2CO3 in the hollows

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