Institute of Nuclear Energy Research, Atomic Energy Council, Executive Yuan

Institute of Nuclear Energy Research, Atomic Energy Council, Executive Yuan, R.o.c

Chia-Te Yen

Charn-Ying Chen

Cheng-Si Tsao

Yeong-Der Lin

Yu-Ching Huang

Chih-Min Chuang

Hou-Chin Cha

De-Han Lu

Zheng-Lin Yu

The present invention discloses a method for improving mass-production yield of large-area organic solar cells for forming the active layer using the roll-to-roll process. The active layer includes low-bandgap high-polymer PTB7, Fullerenes derivative PCBM, and high-boiling-point additives. The addition of the high-boiling-point additives can enhance the efficiency of organic solar cells effectively. In the roll-to-roll process according to the present invention, the drying temperature for the wet film is controlled for controlling the content of additives in the dry film. Thereby, the stability of the overall mass production and the device yield can be both improved.

Method for improving mass-production yield of large-area organic solar cells

A method of making a solar cell includes: preparing an active layer solution including p-type and n-type organic semiconductor materials, a solvent, and an additive, the additive containing 1, 8-iodooctane (DIO) and 1-chloronaphthalene (CN) that has a total volume not greater than 3 vol % based on a total volume of the solvent and the additive; preparing an assembly having a substrate, a first electrode layer, and a first transporting layer; coating the active layer solution on the first transporting layer to form a wet active layer; drying the wet active layer at a temperature not greater than 60&#xb0; C.; and forming a second transporting layer and a second electrode layer on the active layer.

Method of making a solar cell

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Taoyuan, Taiwan

Chia-Te Yen