1 research outputs found
PEDOT:PSS-Nafion/n-Si Hybrid Heterojunction TOPCon Solar Cells: Experiment and Simulation
Poly(3,4-ethylenedioxythiophene):poly(styrenesulfonate)
(PEDOT:PSS)
is one of the most popular hole transport materials for replacing
traditional high-temperature boron diffusion technology due to its
low cost and easy preparation. However, pristine PEDOT:PSS has drawbacks,
such as poor work function (WF) and poor film quality, which inhibit
the improvement of cell efficiency. According to current research
reports, a single dopant can improve only one of these two drawbacks.
In this paper, we used Nafion to simultaneously improve the WF and
wettability of PEDOT:PSS for preparing novel PEDOT:PSS/n-Si hybrid
heterojunction solar cells with a tunnel-oxide passivated contact
(TOPCon) back surface field structure, which we call PEDOT:PSS-Nafion
(PPN)/n-Si hybrid heterojunction TOPCon solar cell. A cell efficiency
of 11.08% was achieved after optimizing the ratio of PEDOT:PSS and
Nafion. The three easily improved parameters, namely, series resistance
(RS), reflectivity, and WF, were studied
and optimized through simulation, achieving a cell efficiency of 20.66%.
To reduce RS in the experiment, the Triton
X-100-doped PEDOT:PSS film (PPTX) was introduced between the n-Si
and PPN films to form highly conductive PPN/PPTX double hole transport
layers, and the cell efficiency was increased from 11.08 to 13.7%.
The experimental and simulated work presented a new thought and practical
guidance for realizing low-cost, easy preparation, and high-efficiency
silicon-based solar cells