Folded reflective tandem polymer solar cell doubles efficiency

Conjugated polymers are promising materials for the production of inexpensive and flexible photovoltaic cells. Organic materials display tunable optical absorption within a large spectral range. This enables the construction of organic tandem photovoltaic cells. The authors here demonstrate a reflective tandem cell where single cells are reflecting the nonabsorbed light upon another adjacent cell. By folding two planar but spectrally different cells toward each other, spectral broadening and light trapping are combined to give an enhancement of power conversion efficiency of a factor of 1.8±0.3.

[1]  Hans-Jürgen Prall,et al.  Enhanced spectral coverage in tandem organic solar cells , 2006 .

[2]  A. Gombert,et al.  Functional microprism substrate for organic solar cells , 2006 .

[3]  N. E. Coates,et al.  Efficient Tandem Polymer Solar Cells Fabricated by All-Solution Processing , 2007, Science.

[4]  Stephen R. Forrest,et al.  High photovoltage multiple-heterojunction organic solar cells incorporating interfacial metallic nanoclusters , 2002 .

[5]  Stephen R. Forrest,et al.  Asymmetric tandem organic photovoltaic cells with hybrid planar-mixed molecular heterojunctions , 2004 .

[6]  Niyazi Serdar Sariciftci,et al.  Organic solar cells: An overview , 2004 .

[7]  Luca Businaro,et al.  Light confinement in thin film organic photovoltaic cells , 2006, SPIE Photonics Europe.

[8]  Mm Martijn Wienk,et al.  Double and triple junction polymer solar cells processed from solution , 2007 .

[9]  Nils-Krister Persson,et al.  Organic tandem solar cells—modelling and predictions , 2006 .

[10]  W. R. Salaneck,et al.  Transparent polymer cathode for organic photovoltaic devices , 2006 .

[11]  Mats Andersson,et al.  Low bandgap alternating polyfluorene copolymers in plastic photodiodes and solar cells , 2004 .

[12]  Haitao Liu,et al.  A new technique for boosting efficiency of silicon solar cells , 2005 .

[13]  Mm Martijn Wienk,et al.  Solution‐Processed Organic Tandem Solar Cells , 2006 .

[14]  P. Würfel,et al.  Improved spectral robustness of triple tandem solar cells by combined series/parallel interconnection , 2004 .

[15]  Gang Li,et al.  Efficient light harvesting in multiple-device stacked structure for polymer solar cells , 2006 .

[16]  K. Triyana,et al.  Tandem-type organic solar cells by stacking different heterojunction materials , 2005 .