Light induced quasi-Fermi level splitting in molecular semiconductor alloys

Abstract

Quasi-Fermi-level (QFL) splitting is a direct measure of the open-circuit voltage (V_OC) in an optically illuminated semiconductor solar cell (SC). The evolution of QFL splitting under 1 sun illumination in...

Vertical-Phase-Locking Effect in Efficient and Stable All-Polymer-Hosted Solar Cells

“…The molecular structures and ultraviolet–visible (UV–vis) absorbances of selected materials are shown in Figure a and b. One of the selection principles for the third component is the expectation to improve the Fermi level bending and the transport and extraction behavior of photogenerated carriers . B1 was introduced as a guest molecule into the all-polymer-hosted active layers, resulting in the ternary active layer exhibiting enhanced absorption (Figure S1).…”

“…One of the selection principles for the third component is the expectation to improve the Fermi level bending and the transport and extraction behavior of photogenerated carriers. 31 EQE value, which points to efficient internal carrier conversion (or charge transfer/collection). 1,6 Figure 1e presents the efficiency box-plot and normal distribution of at least 10 independent-measured devices in each group, indicating that the average efficiencies of ternary devices are all promising than those of conventional binary counterparts and the compatibility of the small-molecule-guest nanofill strategy.…”