Organic spacer engineering in 2D/3D hybrid perovskites for efficient and stable solar cells

Abstract

Perovskite solar cells (PSCs) have attracted widespread attention as their adjustable band gap, easy manufacture, and longer carrier diffusion length. However, the influence of environmental factors such as water, oxygen,...

Enhancement on charge transfer properties of Cu12Sb4S13 quantum dots hole transport materials by surface ligand modulation in perovskite solar cells

“…In recent years, with the advantages of low-cost, easy-preparation, high-efficiency, etc ., perovskite solar cells have received tremendous attention from many researchers. 5–10 The record photovoltaic conversion efficiency of perovskite solar cells is close to that of silicon solar cells, revealing that perovskite solar cells are one of the most potential candidates to take the place of silicon solar cells. However, the poor stability of perovskite solar cells still limits their industrial application.…”

Suppressing hydrogen bonds and controlling surface dipole: effective passivation for hydrophobic perovskite photoabsorber layers in solar cells

“…1 Thus far, PSCs have been developed, especially on the perovskite layer, through various methods such as deposition, [2][3][4] composition manipulation [4][5][6][7] and passivation of perovskite layers. [7][8][9][10][11][12] Owing to the combination of these techniques, PCEs of over 25% are now achievable. 7 Among the techniques, perovskite passivation is a relatively new method, and it has been developed by various passivator materials, [7][8][9][10][11][12] which are mainly divided into aliphatic- 8 or phenyl-ammonium halides.…”

“…[7][8][9][10][11][12] Owing to the combination of these techniques, PCEs of over 25% are now achievable. 7 Among the techniques, perovskite passivation is a relatively new method, and it has been developed by various passivator materials, [7][8][9][10][11][12] which are mainly divided into aliphatic- 8 or phenyl-ammonium halides. 9,10 The passivation is notably effective in imparting hydrophobicity to the perovskite surface and enhancing open circuit voltage (V oc ) of the solar cell due to a decreased recombination through an interfacing between the perovskite and a contact layer (e.g., hole transport material (HTM)).…”

“…7 Among the techniques, perovskite passivation is a relatively new method, and it has been developed by various passivator materials, [7][8][9][10][11][12] which are mainly divided into aliphatic- 8 or phenyl-ammonium halides. 9,10 The passivation is notably effective in imparting hydrophobicity to the perovskite surface and enhancing open circuit voltage (V oc ) of the solar cell due to a decreased recombination through an interfacing between the perovskite and a contact layer (e.g., hole transport material (HTM)). Indeed, for a recently reported cell that exhibited a PCE of over 25%, passivation with aliphatic ammonium salt (i.e., n-octyl ammonium iodide: OAI in Fig.…”

“…For the experiments in this work, FAPbI 3 PSCs and thin film samples for wettability measurements were prepared using previously reported methods with minor modifications (see ESI † for details). Two passivator materials, OAI 7,8 and PEAI, 9,10 were chosen as the representatives of aliphatic-and phenyl-ammonium salts, respectively.…”