Aspect ratio dependent air stability of PbSe nanorods and photovoltaic applications

Download

kim-45-3-32-2012-6.pdf

Date

2021-01-01

Author

Haciefendioglu, Tugba
Asil Alptekin, Demet

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

88
views

32
downloads

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. Fur-thermore, 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.

URI

https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85110969022&origin=inward
https://hdl.handle.net/11511/91488

Journal

Turkish Journal of Chemistry

DOI

https://doi.org/10.3906/kim-2012-6

Collections

Department of Chemistry, Article

Suggestions

OpenMETU
Core

PASSIVATION OF SILICON SOLAR CELLS VIA LOW TEMPERATURE WET CHEMICAL OXIDATION KÖKBUDAK, GAMZE; Çiftpınar, Emine Hande; DEMİRCİOĞLU, OLGU; Turan, Raşit (2016-12-01) In the development of high efficiency crystalline Si solar cells, decreasing bulk and surface recombination velocities of the minority carriers is vital. As the bulk recombination could be suppressed by enhancing the material quality, the effect of surface recombination on cell performance becomes more dominant. Also, recent studies have revealed that the area under the metal contacted region needs to be passivated to minimize the carrier recombination. The passivation of front and back surface of the cell ...
Planar perovskite solar cells with metal oxide transport layers by co-evaporation and hybrid vapor-solution sequential method Soltanpoor, Wiri; Yerci, Selçuk; Department of Micro and Nanotechnology (2020) The recent success in achieving beyond 25% efficiency with perovskite solar cells (PSC) has called for further upgrading the fabrication techniques to meet the scalability requirements of the photovoltaic (PV) industry. Co-evaporation and a hybrid vapor-solution technique have been shown to produce uniform and efficient planar PSCs. Therefore, in this study, co-evaporation method was optimized studying the partial pressure of the organic precursor. Later electron transport layers in n-i-p and p-i-n structur...
Interface passivation of perovskite solar cells with novel cations Çel, Gülsevim Bensu; Günbaş, Emrullah Görkem; Yerci, Selçuk; Department of Micro and Nanotechnology (2022-8) Interface engineering and surface defect passivation play an important role in the development of state-of-the-art perovskite solar cells. Forming an additional two-dimensional (2D) layer on top of the primary perovskite absorber after treatment with organic spacers not only passivates defects and improves the device performance, but also enhances stability. In this study, two novel cations, that are 2,6-methoxy-phenylethyl ammonium iodide (2,6-MeO-PEAI) and 3,5-methoxy-phenylethyl ammonium iodide (3,5-MeO-...
Selective emitter formation via single step doping through laser patterned mask oxide layer for monocrystalline silicon solar cells Çiftpınar, Emine Hande; Turan, Raşit; Department of Physics (2014) Selective emitter is one of the new approaches for higher efficiency solar cells. Although selective emitter cells could be processed by several different methods such as; etch back process, laser doping, ion implantation, doping paste, a different method based on diffusion through a laser patterned oxide layer was studied in this thesis. Utilization of pattern oxide layer as a diffusion barrier enables to obtain selective emitter profile via single step doping which reduces overall production cost and time...
Optical light management by self-arrangement of inverted tetragonal pyramids on the silicon surface through copper-assisted etching technique in a single step Donercark, Ergi; Çolakoğlu, Tahir; Terlemezoğlu, Makbule; Abak, Musa Kurtulus; Çiftpınar, Emine Hande; Bek, Alpan; Turan, Razit (2022-09-01) Developing efficient light trapping techniques plays a crucial role in improving silicon (Si) solar cell parameters by decreasing optical losses. Herein, four various surface morphologies by copper-assisted chemical etching (Cu-ACE) technique under various process conditions were developed. The etching solution is composed of copper nitrate trihydrate (Cu[NO3](2)), hydrofluoric acid, and hydrogen peroxide in deionized water. The systematic correlation study on the molarity of the chemical ingredients reveal...

Citation Formats

T. Haciefendioglu and D. Asil Alptekin, “Aspect ratio dependent air stability of PbSe nanorods and photovoltaic applications,” Turkish Journal of Chemistry, pp. 905–913, 2021, Accessed: 00, 2021. [Online]. Available: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85110969022&origin=inward.