Air stable hybrid inverted tandem solar cell design

作者：Liu Feng; Nunzi Jean Michel^*

来源：Applied Physics Letters, 2011, 99(6): 063301.

DOI：10.1063/1.3622119

In order to get an air stable solar cell with high open circuit voltage (Voc), we fabricated an inverted tandem solar cell based on hybrid wet chemistry and vacuum thermal deposition techniques. A thin metallic interfacial layer was applied to improve charge recombination and maximize both the fill factor and V-oc of the tandem solar cell. A cationic dye doped electron transport layer was used to minimize space charge induced V-oc loss. The tandem cell V-oc reached 1.02 V, which equals the sum of the two subcells' V-oc. Increase of the metal nanoparticles' layer thickness reduces the short circuit current density of the tandem owing to increasing light extinction. Our tandem cell design offers superior air stability due to additional encapsulation effect from top metal oxide layers. It retains about 80% of its original efficiency after storage in air for three months.

• 出版日期2011-8-8