Formation of a nanoporous PbI2 layer framework via 4-tBP additive to improve the performance and stability of two-step prepared hybrid perovskite solar cells under ambient conditions
Por:
Moreno-Romero, Paola M., Rodriguez-Castaneda, Carlos A., Corpus-Mendoza, Asiel N., Torres-Herrera, D. Mateus, Prias-Barragan, Jhon J., Hu, Hailin
Publicada:
1 dic 2022
Ahead of Print:
1 sep 2022
Resumen:
Perovskite solar cells (PSCs) exhibit exceptional photovoltaic
properties but low stability in ambient conditions. Today, the use of
the hydrophobic 4-tert-butylpyridine (4-tBP)-based additive is accepted
as an effective path to overcome such vulnerability. In this work, we
use 4-tBP as the lead iodide (PbI2) precursor solution additive to
obtain volumetrically nanoporous PbI2 films with an average pore size of
10 nm. The obtained nanoporous PbI2 films enhance the diffusion of the
methylammonium iodide/chloride (MAI/MACl) molecules into the PbI2
framework, obtaining perovskite (CH3NH3PbI3-xClx-based) films with
larger and interpenetrated grains. Improvements in crystallinity,
homogeneity, and surface morphology, as well as a power conversion
efficiency (PCE) increment in the PSCs deposited by the two-step method,
are observed when 4-tBP is added. The best performance achieved
corresponds to the PbI2 center dot 4-tBP-based PSC prepared with 120 mu
L of 4-tBP and 0.06 M MAI, which shows J(sc) = 23.02 mA cm(-2), V-oc =
0.99 V, FF = 0.69, and PCE = 15.83%. Likewise, this PSC retains
approximately 90% of its original PCE compared to the 80% retained by
the reference PSC without 4-tBP. It is demonstrated that 4-tBP as an
additive, modifies the PbI2 precursor solution, enhancing the physical
properties of the perovskite films, in addition to improved stability
and PCE of the PSCs under ambient conditions compared with those devices
prepared without 4-tBP.
Filiaciones:
Moreno-Romero, Paola M.:
Univ Politecn Estado Guerrero, Taxco De Alarcon 40321, Guerrero, Mexico
Rodriguez-Castaneda, Carlos A.:
Univ Politecn Estado Guerrero, Taxco De Alarcon 40321, Guerrero, Mexico
Corpus-Mendoza, Asiel N.:
Univ Nacl Autonoma Mexico, Inst Energias Renovables, Priv Xochicalco S-N, Temixco 62580, Morelos, Mexico
Univ Nacl Autonoma Mexico, CONACYT, Temixco, Mexico
Torres-Herrera, D. Mateus:
Univ Nacl Autonoma Mexico, Inst Energias Renovables, Priv Xochicalco S-N, Temixco 62580, Morelos, Mexico
Prias-Barragan, Jhon J.:
Univ Quindio, Interdisciplinary Inst Sci, Doctoral Program Phys Sci & Elect Instrumentat Te, Armenia, Colombia
Hu, Hailin:
Univ Nacl Autonoma Mexico, Inst Energias Renovables, Priv Xochicalco S-N, Temixco 62580, Morelos, Mexico
|