جذب و جمع آوری الکترون در سلول های خورشیدی

Enhanced absorbance and electron collection in inverted organic

solar cells: Optical admittance and transient photocurrent analyses

بهبود جذب و جمع آوری الکترون در سلول های خورشیدی آلی معکوس:

 ورود یا گذر نوری و آنالیز از فوتون گذار

ABSTRACT

Optical admittance analysis reveals that light absorption in inverted organic solar cells (OSCs), based on the same polymer blend layer of regio-regular poly(3-hexylthiophene):[ 6,6]-phenyl-C61-butyric acid methyl ester (PCBM), is always greater than their regular geometry OSCs fabricated using an ITO/poly(3,4-ethylene dioxythiophene):(polystyrene sulfuric acid) anode. Transient photocurrent measurements elucidate that interfacial exciton dissociation at the cathode interfaces of Al-modified ITO/ PCBM (inverted cell) and Al/PCBM (regular cell) is not equivalent. It is shown that the reverse configuration allows improving the absorbance of the cell, favoring charge collection at cathode/PCBM interface and also possessing a dawdling degradation behavior as compared to a control regular OSC in the accelerated aging test.