Jump to main content
Jump to site search

Issue 5, 2013
Previous Article Next Article

From planar-heterojunction to n–i structure: an efficient strategy to improve short-circuit current and power conversion efficiency of aqueous-solution-processed hybrid solar cells

Author affiliations

Abstract

In this paper, inverted hybrid solar cells (HSCs) with planar heterojunction (PHJ) and n–i structure are fabricated from an aqueous-solution-processed poly(p-phenylenevinylene) (PPV) precursor and 2-mercaptoethylamine (MA)-stabilized CdTe nanocrystals (NCs). Firstly, one densely stacked, smooth CdTe film with a wide absorption range and sufficient water resistance is obtained and used for fabricating the PHJ device. A PCE of 3.75% is obtained, which is comparable to the bulk-heterojunction (BHJ) devices. Secondly, the n–i structure is constructed by replacing the PPV layer with a mixed solution consisting of the PPV precursor and CdTe NCs. The n–i structure shows improved photocurrent with lowered fill factor (FF). The low FF is attributed to the severe phase separation of the PPV:CdTe layer, which is caused by the hydrophobicity of the annealed CdTe layer. Subsequently, the hydrophilicity of the annealed CdTe layer is improved by spin-coating an aqueous solution of CdCl2, which greatly increases the FF. Eventually, a record power conversion efficiency of 4.76% is achieved and the maximum Jsc can reach 16.08 mA cm−2.

Graphical abstract: From planar-heterojunction to n–i structure: an efficient strategy to improve short-circuit current and power conversion efficiency of aqueous-solution-processed hybrid solar cells

Back to tab navigation

Supplementary files

Publication details

The article was received on 07 Dec 2012, accepted on 06 Mar 2013 and first published on 06 Mar 2013


Article type: Paper
DOI: 10.1039/C3EE40481A
Energy Environ. Sci., 2013,6, 1597-1603

  •   Request permissions

    From planar-heterojunction to n–i structure: an efficient strategy to improve short-circuit current and power conversion efficiency of aqueous-solution-processed hybrid solar cells

    Z. Chen, H. Zhang, X. Du, X. Cheng, X. Chen, Y. Jiang and B. Yang, Energy Environ. Sci., 2013, 6, 1597
    DOI: 10.1039/C3EE40481A

Search articles by author

Spotlight

Advertisements