Revisiting the Definition of Solar Cell Generations

The classification of photovoltaic technologies into generations aims at facilitating the overview and equally can support the identification of future trends. The initial definition by Martin Green follows the historical development, which however does not necessarily need to imply that a certain technology is old or outdated. To find an update of that early graph without immediately refusing the initial classification, first, the representation is filled with up-to-date numbers. Despite several new definitions of generations being introduced, these merely stay on a general level without quantitative justification. Here, in contrast, classification is further strengthened by numbers of the latest efficiency records and module prices. By becoming specific, it is possible to draw the current picture, compare it to the initial idea and reveal novel trends and potential. Showing different representations of the quantitative values further allows setting a focus of investigation and looking at the situation from various perspectives. In this way, it is expected to support the discussion not just of classification but rather of future technology potential, which becomes apparent from parallel trends. In addition, the importance of advanced optical designs for future competitive efficiency enhancement will be presented.

Automated summary

The classification of photovoltaic technologies into generations is intended to provide an overview and identify future trends. Despite new definitions being introduced, they lack quantitative justification. In contrast, this classification strengthens the use of numbers, such as efficiency records and module prices, to draw the current picture, compare it to the initial idea, and reveal novel trends and potential.