Highly efficient hybrid thin-film solar cells using a solution-processed hole-blocking layer
Ji Hoon SeoDong‐Ho KimSe‐Hun KwonYun Chang ParkHyung Hwan JungHyung Woo LeeJung‐Dae KwonSung‐Gyu ParkKee‐Seok NamYongsoo JeongSeung Yoon RyuJae‐Wook KangChang Su Kim
Abstract
We report the origin of the improvement of the power conversion efficiency (PCE) of hybrid thin-film solar cells when a soluble C(60) derivative, [6,6]-phenyl-C(61)-butyric acid methyl ester (PCBM), is introduced as a hole-blocking layer. The PCBM layer could establish better interfacial contact by decreasing the reverse dark-saturation current density, resulting in a decrease in the probability of carrier recombination. The PCE of this optimized device reached a maximum value of 8.34% and is the highest yet reported for hybrid thin-film solar cells.
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