High-performance Ternary Blend Polymer Solar Cells Involving Both Energy Transfer and Hole Relay Processes

Overview

Journal Nat Commun

Specialty Biology

Date 2015 Jun 5

PMID 26041586

Citations 29

Authors

Luyao Lu

Wei Chen

Tao Xu

Luping Yu

Affiliations

Soon will be listed here.

Abstract

The integration of multiple materials with complementary absorptions into a single junction device is regarded as an efficient way to enhance the power conversion efficiency (PCE) of organic solar cells (OSCs). However, because of increased complexity with one more component, only limited high-performance ternary systems have been demonstrated previously. Here we report an efficient ternary blend OSC with a PCE of 9.2%. We show that the third component can reduce surface trap densities in the ternary blend. Detailed studies unravel that the improved performance results from synergistic effects of enlarged open circuit voltage, suppressed trap-assisted recombination, enhanced light absorption, increased hole extraction, efficient energy transfer and better morphology. The working mechanism and high device performance demonstrate new insights and design guidelines for high-performance ternary blend solar cells and suggest that ternary structure is a promising platform to boost the efficiency of OSCs.

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