PbSe Nanorods for Hybrid Solar Cells: Optimization of Synthesis Protocols and Investigation of Surface Stability

Hacıefendioǧlu, Tuǧba; Alptekin, Demet Asil

doi:10.1109/pvcon.2018.8523936

Cited by 1 publication

(3 citation statements)

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“…Synthesis of NRs was carried out following our previous reports [19]. All the NR formation reactions were performed using standard air-free Schlenk techniques and purifications were carried out in nitrogen filled glovebox (GB).…”

Section: Synthesis Of Pbse Nrsmentioning

confidence: 99%

“…To investigate the effect of aspect ratio on NR properties, a series of NRs with different length to diameter ratios was synthesized. Aspect ratios of the NRs were controlled by varying the stabilizing agent concentration and the injection temperature [19]. Figures 1a-1c present the high-resolution transmission electron microscopy (HRTEM) images of PbSe NRs with aspect ratios of 10.3, 8.3 and 3.0, respectively.…”

Section: Aspect Ratio Dependent Optical Properties and Air Sensitivitymentioning

confidence: 99%

“…As represented in Figure 1, PbSe NRs with 10.3 aspect ratio have a branching percentage of 37%, whereas the branching percentage drops to less than 1% as the aspect ratio is reduced to 3.0. This behavior was attributed to the lower concentration of the OA capping agents used for the synthesis of the shorter PbSe NRs [19,21]. HRTEM images of the individual rods represented as insets in Figure 1 indicate that the PbSe NRs have well-resolved lattice planes.…”

Section: Aspect Ratio Dependent Optical Properties and Air Sensitivitymentioning

confidence: 99%

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Aspect ratio dependent air stability of PbSe nanorods and photovoltaic applications

Asil¹,

Hacıefendioǧlu²

2021

Turk J Chem

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Development of unique strategies to overcome Shockley–Queisser (SQ) limit in solar cells has gained a great deal of interest. Multiple exciton generation (MEG) process has been considered as one of the best approaches to the SQ limitation. In this respect, PbSe quantum dots (QDs) and nanorods (NRs) have been regarded as promising solar energy harvesting materials owing to their noticeable MEG yields. Although air stability has been regarded as one of the main disadvantage of PbSe QDs, no study has pointed out to the air sensitivity of PbSe NRs yet. Here, we reveal the effect of aspect ratio on air sensitivity and optical properties of PbSe NRs and discover that NRs with higher aspect ratios are more air stable, attributed to the reduced density of NR ends with air sensitive {100} facets. Furthermore, a band offset was created by utilization of tetrabutylammonium iodide and 1,2-ethanedithiol ligands in cell designs. We found that solar cells based on pristine PbSe NRs are limited by low open circuit voltages due to leakage current pathways. On the other hand, modified cells comprising light absorbing layers prepared by blending NRs and QDs and hole transporting QD layer exhibit a 10-fold improvement in solar cell efficiency.

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Section: Synthesis Of Pbse Nrsmentioning

confidence: 99%

Section: Aspect Ratio Dependent Optical Properties and Air Sensitivitymentioning

confidence: 99%

Section: Aspect Ratio Dependent Optical Properties and Air Sensitivitymentioning

confidence: 99%

See 1 more Smart Citation

Aspect ratio dependent air stability of PbSe nanorods and photovoltaic applications

Asil¹,

Hacıefendioǧlu²

2021

Turk J Chem

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PbSe Nanorods for Hybrid Solar Cells: Optimization of Synthesis Protocols and Investigation of Surface Stability

Cited by 1 publication

References 20 publications

Aspect ratio dependent air stability of PbSe nanorods and photovoltaic applications

Aspect ratio dependent air stability of PbSe nanorods and photovoltaic applications

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