The principle of photovoltaic technology is, in its essence, simple. Photons emitted from the sun are absorbed by a semiconductor material, causing electrons to move and thereby generating an electric current. This concise principle was rapidly realized in practice alongside advances in semiconductor science beginning in the mid-twentieth century, and today it has become a core technology driving the transformation of global energy systems. In the mid-twentieth century, the maturation of silicon semiconductor technology opened the door to the commercial potential of photovoltaic power generation. Early solar cells suffered from clear limitations in efficiency and cost, yet technological accumulation progressed through the specialized demands of the space industry. As solar technology was adopted as a power source for artificial satellites and spacecraft, it proved its ability to operate reliably even under extreme conditions. Subsequently, terrestrial photovoltaic power generation began to spread as a response to energy security concerns and environmental challenges. As the structural limitations of fossil-fuel-centered energy systems became increasingly apparent, solar power was redefined not as a supplementary energy source, but as a leading candidate for primary electricity generation. Technological progress and economies of scale served as decisive factors accelerating the popularization of the solar industry. Today, photovoltaic technology has evolved into an integrated energy solution combining high-efficiency cells, large-area modules, smart inverters, and energy storage systems. This evolution signifies a shift beyond simple power-generation facilities toward the status of a strategic technology directly linked to national economic and industrial structures.

저자 : PARK SANG-NAM CEO, Global Consulting Corp. Energy & industrial strategy specialist Renewable energy, ESS, SSP National policy advisory experience Author of strategic energy publications

PART I History and Future of Solar Power Technology PART II Structure of the Korean and Global Solar Industry PART III Economic Analysis of SMP, REC, PPA, and ESS PART IV Next-Generation High-Efficiency Solar Technologies PART V ESS, Smart Grid, and Integrated Energy Systems PART VI Future Prospects of Space Solar Power (SSP) PART VII Policy, Institutions, and Market Design for Solar Energy Expansion PART VIII National Energy Scenarios Toward 2035 Appendix