TY - JOUR
T1 - Efficient and ultraviolet durable inverted organic solar cells based on an aluminum-doped zinc oxide transparent cathode
AU - Liu, Hanxiao
AU - Wu, Zhenghui
AU - Hu, Jianqiao
AU - Song, Qunliang
AU - Wu, Bo
AU - Lam Tam, Hoi
AU - Yang, Qingyi
AU - Choi, Wing Hong
AU - Zhu, Furong
N1 - Funding Information:
The work was supported by a grant from the Research Grants Council of the Hong Kong Special Administrative Region, China, Project No. T23-713/11 and the National Natural Science Foundation of China (Grant No. 61275037). J. Q. Hu acknowledges the support by the Applied and Basic Research Foundation of Yunnan Province (2009CD014), and the Research Foundation of Yunnan University (2010YB044). Q. L. Song acknowledges the support by the National Natural Science Foundation of China (Grant No. 11274256) and Doctoral Fund of Ministry of Education of China (20120182110008).
PY - 2013/7/22
Y1 - 2013/7/22
N2 - High performance inverted bulk heterojunction organic solar cells (OSCs), based on the blend of poly[[4,8-bis[(2-ethylhexyl)oxy] benzo [1,2-b:4,5-b′] dithiophene-2,6-diyl][3-fluoro-2-[(2-ethylhexyl)carbonyl] thieno[3,4-b]thiophenediyl]] (PTB7): 3′H-Cyclopropa[8,25] [5,6]fullerene-C70-D5h(6)-3′-butanoicacid, 3′-phenyl-, methyl ester (PC70BM), were achieved using an aluminum-doped zinc oxide (AZO) front transparent cathode. A structurally identical PTB7:PC70BM-based OSC having an indium tin oxide (ITO) front cathode was also made for comparison studies. The surface of AZO and ITO was modified with a 10 nm thick solution-processed ZnO interlayer to facilitate the efficient electron extraction. This work yielded AZO-based OSCs with a promising power conversion efficiency of 6.15%, slightly lower than 6.57% of a control ITO-based OSC, however, a significant enhancement in the stability of AZO-based OSCs was observed under an ultraviolet (UV)-assisted acceleration aging test. The distinctive enhancement in the lifetime of AZO-based OSCs arises from the tailored absorption of AZO electrode in wavelength <380 nm, serving as a UV filter to inhibit an inevitable degradation in ITO-based OSCs caused by the UV exposure.
AB - High performance inverted bulk heterojunction organic solar cells (OSCs), based on the blend of poly[[4,8-bis[(2-ethylhexyl)oxy] benzo [1,2-b:4,5-b′] dithiophene-2,6-diyl][3-fluoro-2-[(2-ethylhexyl)carbonyl] thieno[3,4-b]thiophenediyl]] (PTB7): 3′H-Cyclopropa[8,25] [5,6]fullerene-C70-D5h(6)-3′-butanoicacid, 3′-phenyl-, methyl ester (PC70BM), were achieved using an aluminum-doped zinc oxide (AZO) front transparent cathode. A structurally identical PTB7:PC70BM-based OSC having an indium tin oxide (ITO) front cathode was also made for comparison studies. The surface of AZO and ITO was modified with a 10 nm thick solution-processed ZnO interlayer to facilitate the efficient electron extraction. This work yielded AZO-based OSCs with a promising power conversion efficiency of 6.15%, slightly lower than 6.57% of a control ITO-based OSC, however, a significant enhancement in the stability of AZO-based OSCs was observed under an ultraviolet (UV)-assisted acceleration aging test. The distinctive enhancement in the lifetime of AZO-based OSCs arises from the tailored absorption of AZO electrode in wavelength <380 nm, serving as a UV filter to inhibit an inevitable degradation in ITO-based OSCs caused by the UV exposure.
UR - http://www.scopus.com/inward/record.url?scp=84885005560&partnerID=8YFLogxK
U2 - 10.1063/1.4816786
DO - 10.1063/1.4816786
M3 - Journal article
AN - SCOPUS:84885005560
SN - 0003-6951
VL - 103
JO - Applied Physics Letters
JF - Applied Physics Letters
IS - 4
M1 - 043309
ER -
