Regensburg 2013 – scientific programme

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HL: Fachverband Halbleiterphysik

HL 65: Poster: Organic electronics and photovoltaics (CPP; jointly with HL, O)

HL 65.16: Poster

Wednesday, March 13, 2013, 16:30–18:30, Poster C

Sequentially solution-processed bulk-heterojunction CuPc/PCBM - bilayer for organic solar cells — •Markus Regnat, Fatemeh Ghani, and Hans Riegler — Max Planck Institut of Colloids and Interfaces, Potsdam-Golm, Germany

Copper Phthalocyanine (CuPc) is a commonly used electron donor material in vacuum-processed organic solar cells (OSC) due to its suitable electronic properties, chemical stability and low material cost. Recent studies have revealed appropriate solvents for CuPc [1] and thus also opened a way for cost-efficient wet-deposition techniques, like spin casting or dip coating. Based on this, a working hybrid solution/vacuum processed OSC with a CuPc film prepared by wet-processing (spin cast) could be obtained [2]. The nanostructures of the CuPc film have an important influence on the efficiency of the OSC. A systematic study reveals the impact of various process parameters on nucleation and growth of wet-processed CuPc films and allows the optimization of the nanostructures. By using appropriate orthogonal solvents, even both essential optoelectronic layers (CuPc, PCBM) can now be sequentially wet-deposited for a bulk-heterojunction CuPc/PCBM - bilayer OSC.

[1] Ghani, F.; Kristen, J.; Riegler, H., Solubility properties of unsubstituted metal phthalocyanines in different types of solvents, J. Chem. (2012)

[2] Fatemeh Ghani; Ivelin Bochukov; Konstantinos Fostiropoulos; Hans Riegler, Hybrid solution/vacuum-processed bilayer heterojunction organic solar cells: Structural characterization and performance, Thin Solid Films (2012)