Journal
NANOSCALE RESEARCH LETTERS
Volume 12, Issue -, Pages -Publisher
SPRINGEROPEN
DOI: 10.1186/s11671-017-2418-9
Keywords
Perovskite solar cells; Compact layer; Titanium precursor
Funding
- NSFC-Henan Province Joint Fund [U1604144]
- Program for Science and Technology Innovation Talents in Universities of Henan Province [16HASTIT043]
- Science Fund of Henan Province [162300410020]
- Science Project of Education Department of Henan Province [17A140005, 17B140001]
- Science and Technology Development Project of Henan Province [172102410043, 162102210170]
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Perovskite solar cells (PSCs) have attracted tremendous attentions due to its high performance and rapid efficiency promotion. Compact layer plays a crucial role in transferring electrons and blocking charge recombination between the perovskite layer and fluorine-doped tin oxide (FTO) in PSCs. In this study, compact TiO2 layers were synthesized by spin-coating method with three different titanium precursors, titanium diisopropoxide bis (acetylacetonate) (c-TTDB), titanium isopropoxide (c-TTIP), and tetrabutyl titanate (c-TBOT), respectively. Compared with the PSCs based on the widely used c-TTDB and c-TTIP, the device based on c-TBOT has significantly enhanced performance, including open-circuit voltage, short-circuit current density, fill factor, and hysteresis. The significant enhancement is ascribed to its excellent morphology, high conductivity and optical properties, fast charge transfer, and large recombination resistance. Thus, a power conversion efficiency (PCE) of 17.03% has been achieved for the solar cells based on c-TBOT.
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