Journal
SOLAR ENERGY MATERIALS AND SOLAR CELLS
Volume 94, Issue 3, Pages 542-546Publisher
ELSEVIER
DOI: 10.1016/j.solmat.2009.11.021
Keywords
Flexible tandem organic solar cell; Middle electrode; IZO; Interface modification; Rb2CO3; Cs2CO3
Funding
- Korea Research Foundation (KRF) [R15-2008-006-01001-0(2008)]
- Ministry of Knowledge Economy, Republic of Korea [20093020010040]
- Korea Evaluation Institute of Industrial Technology (KEIT) [20093020010040] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
- National Research Foundation of Korea [R31-2008-000-10075-0, 2008-0062148] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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We demonstrate an efficient middle electrode of indium zinc oxides (IZOs) for flexible organic tandem solar cells. A bulk hetero-junction polymer solar cell and a bi-layer hetero-junction organic solar cell are used as the bottom and top cell, respectively. Insertion of a thin interfacial layer of Rb2CO3 or Cs2CO3 between the polymer and IZO and UV-ozone treatment of the IZO surface results in Ohmic contact with the top and bottom cells, respectively. The tandem devices showed that the open circuit voltage (V-oc) was almost the same as the sum of the V-oc of the individual cells with a fill factor of 0.57. The tandem devices fabricated on flexible PES substrate showed comparable results. (C) 2009 Elsevier B.V. All rights reserved.
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