Enhanced optoelectronic performance in AgBiS₂ nanocrystals obtained via an improved amine-based synthesis route

Abstract

Solar cells fabricated using modified AgBiS2 nanocrystals achieved a PCE of 4.3%, which is a 30% improvement compared with conventional AgBiS2 nanocrystal solar cells.

Improved size distribution of AgBiS 2 colloidal nanocrystals by optimized synthetic route enhances photovoltaic performance

“…Monodisperse colloidal NCs as a light-absorbing layer provide reduced energetic disorder and band tail broadening, both of which are urgently required to improve solar cell performance. [24][25][26][27][28] The use of oleylamine in previous oleate-based synthetic routes enables improved monodispersity of AgBiS 2 NCs because the oleylamine not only helps the Ag precursor to completely dissolve, but also provides an efficient surface passivation of the AgBiS 2 NCs with oleic acid. 28 Surface ligands with various functional groups such as thiol, amine, and carboxylate greatly affect the chemical and physical properties of the resultant semiconducting colloidal NCs.…”

“…[24][25][26][27][28] The use of oleylamine in previous oleate-based synthetic routes enables improved monodispersity of AgBiS 2 NCs because the oleylamine not only helps the Ag precursor to completely dissolve, but also provides an efficient surface passivation of the AgBiS 2 NCs with oleic acid. 28 Surface ligands with various functional groups such as thiol, amine, and carboxylate greatly affect the chemical and physical properties of the resultant semiconducting colloidal NCs. 28,29 In particular, the ligand binding sites and energies on NC surfaces vary according to the functional groups of the surface ligands, indicating that these groups undergo different ligand exchange mechanisms.…”

Charge Photogeneration and Transport in AgBiS2 Nanocrystal Films for Photovoltaics

“…Therefore, there is a strive for nontoxic, earth‐abundant solar cell materials. A very promising solar cell material consists of AgBiS 2 nanocrystals . Recently, a solar cell based on AgBiS 2 nanocrystals has been demonstrated with a certified power conversion efficiency of 6.3%, for an active film thickness of only 35 nm .…”

AgBiS2 as a low-cost and eco-friendly all-inorganic photovoltaic material: nanoscale morphology–property relationship

“…On the other hand, AgBiS 2 nanocrystals (NCs) have emerged as a candidate lead-free inorganic PV material, because the nanocrystals are composed of non-toxic and earth-abundant elements. [19][20][21] Applications of AgBiS 2 NCs as a solar-cell material were rst reported by Bernechea et al in 2016, although the synthesis of AgBiS 2 bulk and nanocrystal materials has been reported much earlier. 19 Bernechea et al demonstrated a certied PCE of 6.3% for AgBiS 2 NCs based solar cells fabricated at the ambient pressure and at temperatures below 100 C. Note that all elements (Ag, Bi, and S) in AgBiS 2 NCs are earth-abundant.…”