Skip to content

Solar Energy

Electricity generation from photovoltaic and thermal solar technologies

Fig. 35 · Burning glass

The field

At a glance

Definition

The solar energy sector harnesses sunlight to generate electricity and heat, contributing to a sustainable and renewable energy future.

Field overview

The solar energy sector has witnessed significant evolution over the last few decades, transitioning from niche applications to mainstream energy solutions. The sector's history dates back to the 1830s when the first photovoltaic cell was invented, but it gained substantial momentum in the 1970s amid the oil crises. Currently, the landscape is dominated by solar panels and solar thermal systems, with rapid advancements in technology driving efficiency and cost reductions. Recent trends include the increasing adoption of solar storage solutions and innovative financing models, while the future outlook points towards integrated solar solutions and smart grids that delineate energy generation and consumption.

Technologies

Perovskite solar cells promise higher efficiency at lower manufacturing cost. Tandem architectures (perovskite-on-silicon) target 30%+ efficiency versus 22-24% for standard silicon. Bifacial panels capture reflected light from both sides. Solar tracking systems optimize panel orientation throughout the day. Solar design software automates system sizing and permitting.

Applications

Utility-scale solar farms provide grid power at costs below fossil fuels. Rooftop solar enables distributed generation for homes and businesses. Solar-plus-storage provides dispatchable clean power. Building-integrated PV generates electricity from facades and windows.

Market and funding

Solar is the lowest-cost source of new electricity generation in most markets, with global installations exceeding 400 GW in 2024. With 9 funders, Solar Energy is an Energy child sector focused on next-generation technologies and software rather than commodity panel manufacturing.

Is this page right?How the research works

Something's off