At the last online HOPV 2020 conference, Enrique Pascual received the best Best ePoster Content and Discussion at the Symposium of S4 (Organic Solar Cells) ‘Towards Photovoltaic Windows: Laser-assisted Fabrication of Semitransparent OPV Modules Based on Non-fullerene Acceptors’.
Science does not stop and the 12th International Conference on Hybrid and Organic Photovoltaics (HOPV 2020) was held online adapted to the current scenario. Several Nanopto members participated with the so-called e-poster which is an online version of traditional posters hung on boards. Moreover, conference participants could interact with poster authors via online chat. In particular, Nanopto e-posters were:
- ‘Phase Diagram of FAxMA1-xPbI3 Solid Solutions from Temperature-Dependent PL and Raman Spectroscopies’ by Dr. Alejandro Goñi.
- ‘Pressure-Induced Locking of MA+ Cations versus Amorphization in Hybrid Perovskites’ by Dr. Adrián Francisco.
- ‘Near Infrared Organic Photodetectors based on Enhanced Charge Transfer State Absorption by Photonic Architectures’ by Mr. Martí Gibert.
- ‘Towards Photovoltaic Windows: Laser-assisted Fabrication of Semitransparent OPV Modules Based on Non-fullerene Acceptors’ by Mr. Enrique Pascual
- ‘Efficient Exploration of the Composition Space in Ternary Organic Solar Cells by Combining High-Throughput Material Libraries and Hyperspectral Imaging’ by Mr. Albert Harillo.
Semitransparent organic photovoltaics (OPV) have unique properties for niche applications in the so-called building-integrated photovoltaics (BIPV) that require transparency such as windows or glazings. Moderate levels of transparency were traditionally achieved by implementing non-opaque electrodes and thin photoactive layers, thus limiting the light-harvesting capacity. The deposition of such semitransparent electrodes generally requires an evaporation step, thus increasing the device price. As a cost-effective alternative to boost simultaneously the efficiency and transparency of OPV modules, solution-processed electrodes and near inferred absorber photoactive materials are employed nowadays. In this work, we combine two commercial OPV materials, the blue low-bandgap polymer PBTZT-stat-BDTT-8 with the near-infrared absorbing non-fullerene acceptor 4TICO. Furthermore, semitransparent devices are upscaled from mm2-size single-cells to cm2 modules, following manufacturing processes that are fully compatible with large-scale productionand with the printing industry regulations. Our prototypes of semitransparent laser-patterned OPV modules exceed 30% of transparency and yield efficiencies in the range of 4%, geometrical fill factors surpassing 90% and an active area above 1 cm2. We verify the quality of cell-to-cell interconnection and optimise the geometry of the modules with the help of local optoelectronic imaging techniques.
The poster summarises the recent work published in the Journal of Materials Chemistry A ‘Towards photovoltaic windows: scalable fabrication of semitransparent modules based on non-fullerene acceptors via laser-patterning’