Enhanced photocurrent in PbSe nanorod-quantum dot bulk nano-heterojunction solar cells

Date

2021-01-01

Author

Hacıefendioğlu, Tuğba
Balıkoğlu, Bensu
Aydın, Firdevs
Kolay, İrem
Öztürk, İbrahim
Asil, Demet

Metadata

Show full item record

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

Item Usage Stats

164
views

0
downloads

Owing to their remarkable multiple exciton generation (MEG) yield, PbSe nanorods (NRs) have been considered as one of the most promising materials to overcome the Shockley–Queisser limit. Unfortunately, assessing the direct role of the PbSe NRs in solar cell designs has been challenging due to their unoptimized film microstructure and poor performances. Here we devise a cell architecture that overcomes these limitations by inserting an electron blocking quantum dot (QD) layer to the NR/metal interface. Further enhancement was achieved by creating a bulk nano-heterojunction (BNHJ) platform comprising the covalently bonded PbSe NRs-donors and PbSe QDs-acceptors. The overall benefit of the exciton cascade, enabling an efficient non-radiative energy transfer, was evidenced through a photocurrent enhancement at energies where the hot exciton generation is expected to take place, that is ≥ 2Eg (Eg = band gap). Resulting BNHJ solar cells exhibit 2.42% efficiency and a peak internal quantum efficiency of 100% with a threshold photon energy of 2.9 Eg, outperforming the present cells comprising the NRs with similar band gaps. This proof-of-principle demonstrates that the concept of BNHJ has a practical potential and a breakthrough in the design of the MEG-based solar cells.

URI

https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85118981927&origin=inward
https://hdl.handle.net/11511/94884

Journal

Journal of Materials Science: Materials in Electronics

DOI

https://doi.org/10.1007/s10854-021-07342-y

Collections

Department of Chemistry, Article

Suggestions

OpenMETU
Core

DONOR-ACCEPTOR TYPE BULK NANO-HETEROJUNCTION SOLAR CELL DESIGNS BASED ON ELECTRONICALLY COUPLED LEAD SELENIDE NANORODS AND LEAD SELENIDE QUANTUM DOTS Kolay, İrem; Asil Alptekin, Demet; Department of Chemistry (2022-7-22) Multiple exciton generation (MEG) process has received a great deal of attention in solar energy research due to its high potential in improving photocurrent. In this respect, PbSe NRs are considered as one of the most promising candidates due to their remarkable MEG yield. However, limited number of solar cell studies based on PbSe NRs and their poor performances have been limiting their utilization in photovoltaic (PV) technologies. In this thesis, previously introduced solar cell design, where covalently...
Aspect ratio dependent air stability of PbSe nanorods and photovoltaic applications Haciefendioglu, Tugba; Asil Alptekin, Demet (2021-01-01) 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 o...
Production of flexible polymeric photoanodes using binder-free electrophoretic deposition and compression for dye-sensitized solar cells Kocaoglu, Bahadir Can; Özenbaş, Ahmet Macit (2015-04-29) Electrophoretic deposition (EPD) of titania nanoparticles have been utilized in order to form the nanoporous photoanodes of dye-sensitized solar cells (DSSCs) on flexible polymeric (PEN/PET) substrates. Highly uniform, adherent nanoporous thick films were produced by uniformly dispersing the titania nanoparticles in alcoholic suspensions without any binders. Suspension performances of each type of isopropanol based mixtures have been examined. Additionally, the effect of acetylacetone addition in suspension...
Study of high radio frequency plasma discharge effects on carbon fiber using Raman spectroscopy Akbar, D.; Erözbek Güngör, Ümmügül (Elsevier BV, 2014-02-15) The goal of this research is to evaluate the potential of single and dual high RF reactors for the treatment of carbon fiber by Raman and FT-IR spectroscopies. Unsized poly-acrylonitrile (PAN) carbon fiber was treated with single high frequency (40.68 MHz) and double radio frequency capacitively coupled plasma (RF-CCP) discharge reactor (40.68/2.1 MHz) using pure nitrogen gas. The changes in the structure of the carbon fiber surfaces due to the variations of the D and G band intensity ratio (I-D/I-G), cryst...
Optimization of Selective Electrophoretic Deposition and Isostatic Compression of Titania Nanoparticles for Flexible Dye-Sensitized Solar Cells Kocaoglu, Bahadir Can; Icli, Kerem Cagatay; Özenbaş, Ahmet Macit (2016-04-01) Flexible photoanodes on PEN/PET based substrates for dye-sensitized solar cells (DSSC) by using electrophoretic deposition (EPD) method for the formation of titania nanoporous layer with titania nanoparticles (P-25) were produced. Considering commercially available titania nanoparticles containing both anatase and rutile phases, the undesired rutile nanoparticles, for DSSC applications, were almost eliminated from the coatings by selective pH adjustment of the EPD solutions without any binders. The coating ...

Citation Formats

T. Hacıefendioğlu, B. Balıkoğlu, F. Aydın, İ. Kolay, İ. Öztürk, and D. Asil, “Enhanced photocurrent in PbSe nanorod-quantum dot bulk nano-heterojunction solar cells,” Journal of Materials Science: Materials in Electronics, pp. 0–0, 2021, Accessed: 00, 2021. [Online]. Available: https://www.scopus.com/inward/record.uri?partnerID=HzOxMe3b&scp=85118981927&origin=inward.