TY - JOUR
T1 - Enhancing the Charge Extraction and Stability of Perovskite Solar Cells Using Strontium Titanate (SrTiO3) Electron Transport Layer
AU - Neophytou, Marios
AU - De Bastiani, Michele
AU - Gasparini, Nicola
AU - Aydin, Erkan
AU - Ugur, Esma
AU - Seitkhan, Akmaral
AU - Moruzzi, Floriana
AU - Choaie, Yasmin
AU - Ramadan, Alexandra J.
AU - Troughton, Joel R.
AU - Hallani, Rawad
AU - Savva, Achilleas
AU - Tsetseris, Leonidas
AU - Inal, Sahika
AU - Baran, Derya
AU - Laquai, Frédéric
AU - Anthopoulos, Thomas D.
AU - Snaith, Henry J.
AU - De Wolf, Stefaan
AU - McCulloch, Iain
N1 - Publisher Copyright:
© 2019 American Chemical Society.
PY - 2019/11/25
Y1 - 2019/11/25
N2 - Charge transport layers strongly influence the performance of perovskite solar cells (PSCs). To date, compact layers and mesoporous scaffolds of titanium dioxide have emerged as good electron transport layers (ETL), enabling record power conversion efficiencies (PCE). However, these ETLs require sintering above 400 °C, which excludes them from low-temperature applications such as flexible devices and silicon-heterojunction tandems. Furthermore, instability of TiO2 under prolonged exposure to sunlight appears to be a critical issue. Here, we present the promising characteristics of low-temperature processed strontium titanate (STO) as an ETL to realize PSCs with 19% PCE. STO is a wide bandgap transparent inorganic perovskite. Compared with other low-temperature processed interlayers, STO reduces the parasitic absorption in the ultraviolet and visible range, improves the electron transport, and greatly increases the stability of the devices, retaining ∼80% of their initial efficiency after 1000 h of constant white light illumination.
AB - Charge transport layers strongly influence the performance of perovskite solar cells (PSCs). To date, compact layers and mesoporous scaffolds of titanium dioxide have emerged as good electron transport layers (ETL), enabling record power conversion efficiencies (PCE). However, these ETLs require sintering above 400 °C, which excludes them from low-temperature applications such as flexible devices and silicon-heterojunction tandems. Furthermore, instability of TiO2 under prolonged exposure to sunlight appears to be a critical issue. Here, we present the promising characteristics of low-temperature processed strontium titanate (STO) as an ETL to realize PSCs with 19% PCE. STO is a wide bandgap transparent inorganic perovskite. Compared with other low-temperature processed interlayers, STO reduces the parasitic absorption in the ultraviolet and visible range, improves the electron transport, and greatly increases the stability of the devices, retaining ∼80% of their initial efficiency after 1000 h of constant white light illumination.
KW - charge extraction
KW - electron transport layers
KW - oxide perovskites
KW - perovskite solar cells
KW - photovoltaic device stability
KW - strontium titanate
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U2 - 10.1021/acsaem.9b01567
DO - 10.1021/acsaem.9b01567
M3 - Article
AN - SCOPUS:85075082884
SN - 2574-0962
VL - 2
SP - 8090
EP - 8097
JO - ACS Applied Energy Materials
JF - ACS Applied Energy Materials
IS - 11
ER -