Abstract
We successfully demonstrate a smart strategy to use aluminum doped ZnO (AZO) and the thiophene-based conjugated polyelectrolyte P3TMAHT as an interfacial layer in small molecule solution-processed inverted solar cells. Modification of AZO with a thin P3TMAHT layer increases the photovoltaic properties of the inverted cell as a result of reduction in the work function of the cathode with well aligned frontier orbital energy levels for efficient charge transport and reduced surface recombination. The inverted device achieved ∼16% performance improvement dominantly by recapturing part of the V oc losses when going from conventional to the inverted architecture. In addition, the inverted device using the AZO/P3TMAHT interlayer shows improved device stability in air compared to conventional devices. © 2013 The Royal Society of Chemistry.
Original language | English |
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Pages (from-to) | 11306-11311 |
Number of pages | 6 |
Journal | Journal of Materials Chemistry A: materials for energy and sustainability |
Volume | 1 |
Issue number | 37 |
DOIs | |
Publication status | Published - 2013 |
Keywords
- Aluminum-doped ZnO
- Conjugated polyelectrolytes
- Frontier orbital energies
- Inverted architectures
- Inverted solar cells
- Photovoltaic property
- Solution-processed
- Surface recombinations
- Molecules
- Polyelectrolytes
- Zinc oxide
- Solar cells