Oriented Growth of Al2O3:ZnO Nanolaminates for Use as Electron-Selective Electrodes in Inverted Polymer Solar Cells
Atomic layer deposition is used to synthesize Al{sub 2}O{sub 3}:ZnO(1:x) nanolaminates with the number of deposition cycles, x, ranging from 5 to 30 for evaluation as optically transparent, electron-selective electrodes in polymer-based inverted solar cells. Al{sub 2}O{sub 3}:ZnO(1:20) nanolaminates are found to exhibit the highest values of electrical conductivity (1.2 x 10{sup 3} S cm{sup 01}; more than six times higher than for neat ZnO films), while retaining a high optical transmittance ({>=}80% in the visible region) and a low work function (4.0 eV). Such attractive performance is attributed to the structure (ZnO crystal size and crystal alignment) and doping level of this intermediate Al{sub 2}O{sub 3}:ZnO film composition. Polymer-based inverted solar cells using poly(3-hexylthiophene) (P3HT):phenyl-C{sub 61}-butyric acid methyl ester (PCBM) mixtures in the active layer and Al{sub 2}O{sub 3}:ZnO(1:20) nanolaminates as transparent electron-selective electrodes exhibit a power conversion efficiency of 3% under simulated AM 1.5 G, 100 mW cm{sup -2} illumination.
- Research Organization:
- National Renewable Energy Laboratory (NREL), Golden, CO (United States)
- Sponsoring Organization:
- USDOE Office of Energy Efficiency and Renewable Energy (EERE), Renewable Power Office. Solar Energy Technologies Office
- DOE Contract Number:
- AC36-08GO28308
- OSTI ID:
- 1047349
- Report Number(s):
- NREL/JA-5200-55326; TRN: US201216%%209
- Journal Information:
- Advanced Functional Materials, Vol. 22, Issue 7; ISSN 1616-301X
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
36 MATERIALS SCIENCE
ALIGNMENT
CONVERSION
CRYSTALS
DEPOSITION
EFFICIENCY
ELECTRIC CONDUCTIVITY
ELECTRODES
ESTERS
EVALUATION
FILMS
GROWTH
ILLUMINANCE
LAYERS
LEVELS
MIXTURES
PERFORMANCE
POLYMERS
POWER
SIZE
SOLAR CELLS
USES
WORK FUNCTIONS
inverted solar cells
nanolaminates
optically transparent