Perovskite solar cells are attracting strong interest because they combine high power conversion efficiency with potentially low manufacturing costs. Laboratory efficiencies have already exceeded 27%, but conventional flat panel designs lose performance as the sun moves across the sky, because changing angles of incidence increase reflection losses and reduce light penetration into the absorbing layer.
A research team has now presented a simulation led device concept called angle robust photovoltaics. Instead of relying on trackers to keep panels facing the sun, the design uses a hemisphere core shell perovskite solar cell architecture with a textured rounded cone front surface. The geometry is intended to capture sunlight from many directions while supporting balanced charge collection.
The textured surface scatters incoming light in multiple directions and triggers hybridised Mie resonances within the perovskite layer. According to the researchers, this spreads the optical field more evenly through the device, producing more uniform carrier generation. The hemisphere shape also creates symmetrical pathways for electrons and holes to travel from the outer surface to the core, which supports extraction and reduces recombination losses.
Three dimensional optoelectronic simulations indicate that the structure retains broadband absorption above 95% across incidence angles from 0° to 50°. The modelled device achieves a maximum power density of 28.25 mW/cm², with power output variance below 0.02. The study reports that output fluctuation falls from 0.83 to 0.02, a decrease of 97.59%.
The findings suggest a route to more consistent solar electricity generation across the day and across seasons without the moving parts, capital cost and maintenance burden associated with tracking systems. For African energy projects, where reliability, land use and lifecycle costs are central considerations, such tracker free designs could become relevant for utility scale plants, commercial rooftops and building integrated photovoltaics.
The work remains simulation based, so laboratory fabrication, durability testing and real world performance validation will be needed before the concept can be assessed for commercial deployment. Even so, the researchers describe it as a device level pathway to stable photovoltaic output and more cost effective solar energy harvesting.
Link to the full paper HERE
Author: Bryan Groenendaal
October 7, 2026
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