期刊
ACS APPLIED MATERIALS & INTERFACES
卷 5, 期 3, 页码 1100-1107出版社
AMER CHEMICAL SOC
DOI: 10.1021/am302878m
关键词
polymer solar cells; hole selective layers; polyoxomolybdates; solution-processing; polymer; device stabilities
资金
- National Natural Science Foundation of China [51273020, 90923015]
- Fundamental Research Funds for the Central Universities [FRF-SD-12-005B]
- Program for Changjiang Scholars and Innovative Research Team in University
- State Key Lab for Advanced Metals and Materials [2012-ZD05]
A new method is reported for preparing solution-processed molybdenum oxide (MoO3) hole selective layer (HSL). Via combustion processing at low annealing temperatures, the obtained MoO3 HSL exhibits a high charge-transporting performance similar to poly(ethylenedioxythiophene):polystyrene sulfonate (PEDOT:PSS) but overcoming its defect to device stability. The combustion precursor solution using ammonium heptamolybdate as the metal source, acetylacetone as a 'fuel', and nitric acid as an oxidizer can largely reduce the temperature for transformation of the polyoxomolybdate to alpha-phase MoO3. Furthermore, when a small amount of PEDOT:PSS has been introduced into the combustion precursor solution to improve the film morphology, the derived film can exhibit a flat and continuous surface morphology with coexistence of alpha- and beta-MoO3 after being annealed at a low temperature (150 degrees C). The simplicity, rapidness, and effectiveness of our method together with the low annealing temperature needed make it promising for the roll-to-roll manufacture of polymer solar cells.
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