The role of a LiF layer on the performance of poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)/Si organic-inorganic hybrid solar cells

Journal Article · Mon Feb 24 00:00:00 EST 2014 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4866968· OSTI ID:22293053

Zhang, Yunfang ^[1]; Liu, Ruiyuan; Lee, Shuit-Tong; Sun, Baoquan ^[1]

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1. Jiangsu Key Laboratory for Carbon-Based Functional Materials and Devices, Institute of Functional Nano and Soft Materials (FUNSOM) and Collaborative Innovation Center of Suzhou Nano Science and Technology, Soochow University, 199 Ren'ai Road, Suzhou 215123 (China)

We report an ultra-thin layer of lithium fluoride (LiF) between silicon (Si) and aluminum (Al) in a Si/poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate) (PEDOT:PSS) hybrid solar cell which resulted in a power conversion efficiency (PCE) of 11.09%. The insertion of a thin layer of LiF improved the contact between Si and Al, which decreased the contact resistance from 5.4 × 10{sup −1} Ω cm{sup 2} to 2.6 × 10{sup −2} Ω cm{sup 2}. Also, the electron transport from Si to Al was improved and charge carrier recombination was suppressed. As a result, the short circuit current density, the open circuit voltage, and the fill factor were all improved with the presence of the LiF layer. The solar cell with the LiF/Al bilayer as a cathode displayed a 14.45% enhancement on PCE when compared with the device using pristine Al as a cathode.

• OSTI ID: 22293053
• Journal Information: Applied Physics Letters, Vol. 104, Issue 8; Other Information: (c) 2014 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
14 SOLAR ENERGY
ALUMINIUM
CATHODES
CHARGE CARRIERS
CURRENT DENSITY
EFFICIENCY
ELECTRIC POTENTIAL
ELECTRICAL FAULTS
ENERGY CONVERSION
FILL FACTORS
INORGANIC COMPOUNDS
LITHIUM FLUORIDES
ORGANIC COMPOUNDS
RECOMBINATION
SILICON
SOLAR CELLS
THIN FILMS