Increasing Efficiency with Multiple Exciton Generation

摘要: In a conventional solar cell the energy of an absorbed photon in excess band gap is lost as heat photo-generated charges cool rapidly to edge; for silicon-based under standard insolation this loss equivalent 47 % incident power. However, colloidal quantum dots alternative process can become significant—multiple exciton generation (MEG). Here, immediately after absorption carriers instead use produce additional electron–hole pairs, which contribute photocurrent and thereby increase efficiency cell. chapter, phenomenon will be introduced its potential increasing dot cells discussed. MEG was first investigated spectroscopically challenging techniques used described. Progress since demonstration 2004 then reviewed, including controversy over yields resolution. The recent devices benefiting from detailed. Finally, several possible future directions research