4.6 Article

High-performance ternary solar cells by introducing a medium bandgap acceptor with complementary absorption, reducing energy disorder and enhancing glass transition temperature

Journal

JOURNAL OF MATERIALS CHEMISTRY A
Volume 10, Issue 33, Pages 17122-17131

Publisher

ROYAL SOC CHEMISTRY
DOI: 10.1039/d2ta04463c

Keywords

-

Funding

  1. National Natural Science Foundation of China (NSFC) [52061135206]
  2. Fundamental Research Funds for the Central Universities
  3. Open Fund of the State Key Laboratory of Luminescent Materials and Devices (South China University of Technology)
  4. Russian Science Foundation [21-43-00051]
  5. Ministry of Science and Higher Education of the Russian Federation [FFSM-2021-0005]

Ask authors/readers for more resources

In this study, a medium bandgap acceptor TPIIC was introduced into PM6:Y6 host devices, and an effective method to reduce energy loss and improve stability in ternary devices was discovered.
Owing to the relentless march of technology of non-fullerene acceptors (NFAs), ternary organic solar cells (TOSCs) are demonstrating impressive power conversion efficiencies (PCEs). More efficient boosting needs to be achieved in reducing the energy loss (E-loss) and enhancing the operational lifespan of TOSCs. Herein, we introduced a medium bandgap NFA, TPIIC, as the third component into PM6:Y6 host devices and found that the highly crystalline guest acceptor TPIIC with a relatively low lowest unoccupied molecular orbital, is miscible with the Y6 phase. Moreover, compared with the Y6 neat film, the Y6:TPIIC blend films show higher photoluminescence quantum yield, demonstrating the reduced energy disorder in ternary devices. Consequently, ternary devices exhibit reduced non-radiative recombination loss and delivered distinct improvements in the open-circuit voltage (V-OC, 0.861 V) and PCE (17.7%) with a reduced E-loss of 0.535 eV, in comparison to the PM6:Y6 host devices (V-OC = 0.840 V, PCE = 15.8% and E-loss = 0.547 eV). Importantly, the role of TPIIC in increasing the glass transition temperature of the ternary blend is illustrated and its applicability for improving relevant stability issues of the host devices is verified. Overall, this study developed an effective means to simultaneously reduce the E-loss and improve operation stability of OSCs.

Authors

I am an author on this paper
Click your name to claim this paper and add it to your profile.

Reviews

Primary Rating

4.6
Not enough ratings

Secondary Ratings

Novelty
-
Significance
-
Scientific rigor
-
Rate this paper

Recommended

No Data Available
No Data Available