Mixed AgBiS₂ nanocrystals for photovoltaics and photodetectors

Abstract

Heavy-metal-free colloidal nanocrystals are gaining due attention as low-cost, semiconducting materials for solution-processed optoelectronic applications. One common limitation of such materials is their limited carrier transport and trap-assisted recombination, which...

Optoelectronic Modulation of Silver Antimony Sulfide Thin Films for Photodetection

“…It possess a slightly smaller band gap compared with Sb 2 S 3 and could convert more photons. However, Ag x SbS 2 still severely suffers from abundant trap states and exhibited relatively high recombination losses and low open-circuit voltage for solar cells . In addition, there is less work reported on photodetectors, , and systematic study and device considerations are required .…”

“…However, Ag x SbS 2 still severely suffers from abundant trap states and exhibited relatively high recombination losses and low open-circuit voltage for solar cells . In addition, there is less work reported on photodetectors, , and systematic study and device considerations are required . On the other hand, photodetectors based on a field-effect transistor (FET) structure − have demonstrated great potential for next-generation photodetection and possess extremely high and controllable photoconductive gain, excellent compatibility with a read-out circuit, and fewer requirements on the surface morphology, such as pin-holes and clusters .…”

A Colloidal Synthesis Route Towards AgBiS2 Nanocrystals Based on Metal Xanthate Precursors

“…Currently, power conversion efficiencies of AgBiS 2 based solar cells up to 6-9% are reported. [2,[26][27][28][29][30][31][32][33][34][35][36][37] Metal dithiocarbamates have been applied as precursors for the formation of ultrathin films via solution-based deposition and subsequent decomposition of the precursors [38] and for the formation of AgBiS 2 nanocrystals via a heat up method with the use of oleylamine (OM). [39] Moreover, metal xanthates are typically also versatile single source precursors for the preparation of metal sulfide nanocrystals via colloidal synthesis routes.…”

“…Following this report, several studies focused on the optimization of the performance of AgBiS 2 solar cells based on fabricating high quality colloidal AgBiS 2 nanocrystals via this or modified synthetic routes. Currently, power conversion efficiencies of AgBiS 2 based solar cells up to 6–9% are reported [2,26–37] …”

Atomic periodic engineering enabled ultrathin high-efficiency AgBiS2 solar cells

“…However, current photovoltaic materials do not meet the requirements simultaneously, either having toxic elements like lead or cadmium, [1][2][3] or using rare metals like indium (CIGS 4 ), or requiring high-temperature fabrication (silicon 5 ). The ternary chalcogenide AgBiS 2 has emerged as one of the most promising candidates 6,7 owing to its tunable bandgap, 8 high absorption coefficient, 9 non-toxicity, 10 earth-abundant elements, 11 and solution-processing. 12 In particular, one of the key advantages of AgBiS 2 solar cells is their ultrathin absorber thickness, 6,9,[12][13][14] which allows their application in flexible and wearable devices.…”