3 Percolation Toward Lateral Junctions
71
I Q E = η EC × η E D × η CC
(3.3)
We presume that this low efficiency was caused by the long alkyl chains of C8BTBT and PTCDI-C8 acting as 2-nm-thick insulators and inhibiting the initial charge
separation. However, the lateral alternating multilayered junction (Fig. 3.15a) is a
universal principle, and various kinds of organic semiconductors are suitable for use
in these junctions. One of the advantages of a lateral carrier-collecting alternating
multilayered cell is its unlimited thickness in the vertical direction (Fig. 3.21a).
Therefore, tandem solar cells that can utilize the full solar spectrum can be freely
designed. Owing to the millimeter-scale macroscopic lateral distance between the
electrodes, modules with large surface areas can be fabricated by a simple masking
system (Fig. 3.21b).
Fig. 3.21 a Unlimited thickness in the vertical direction. b Modules with large surface areas can be
fabricated by a simple masking system owing to the millimeter-scale macroscopic lateral distance
between the electrodes
71
I Q E = η EC × η E D × η CC
(3.3)
We presume that this low efficiency was caused by the long alkyl chains of C8BTBT and PTCDI-C8 acting as 2-nm-thick insulators and inhibiting the initial charge
separation. However, the lateral alternating multilayered junction (Fig. 3.15a) is a
universal principle, and various kinds of organic semiconductors are suitable for use
in these junctions. One of the advantages of a lateral carrier-collecting alternating
multilayered cell is its unlimited thickness in the vertical direction (Fig. 3.21a).
Therefore, tandem solar cells that can utilize the full solar spectrum can be freely
designed. Owing to the millimeter-scale macroscopic lateral distance between the
electrodes, modules with large surface areas can be fabricated by a simple masking
system (Fig. 3.21b).
Fig. 3.21 a Unlimited thickness in the vertical direction. b Modules with large surface areas can be
fabricated by a simple masking system owing to the millimeter-scale macroscopic lateral distance
between the electrodes