Effect of band-aligned double absorber layers on photovoltaic characteristics of chemical bath deposited PbS/CdS thin film solar cells

Deuk Ho Yeon, Bhaskar Chandra Mohanty, Seung Min Lee, Yong Soo Cho

Research output: Contribution to journalArticle

11 Citations (Scopus)

Abstract

Here we report the highest energy conversion efficiency and good stability of PbS thin film-based depleted heterojunction solar cells, not involving PbS quantum dots. The PbS thin films were grown by the low cost chemical bath deposition (CBD) process at relatively low temperatures. Compared to the quantum dot solar cells which require critical and multistep complex procedures for surface passivation, the present approach, leveraging the facile modulation of the optoelectronic properties of the PbS films by the CBD process, offers a simpler route for optimization of PbS-based solar cells. Through an architectural modification, wherein two band-aligned junctions are stacked without any intervening layers, an enhancement of conversion efficiency by as much as 30% from 3.10 to 4.03% facilitated by absorption of a wider range of solar spectrum has been obtained. As an added advantage of the low band gap PbS stacked over a wide gap PbS, the devices show stability over a period of 10 days.

Original languageEnglish
Article number14353
JournalScientific reports
Volume5
DOIs
Publication statusPublished - 2015 Sep 23

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baths
absorbers
solar cells
thin films
quantum dots
solar spectra
energy conversion efficiency
passivity
heterojunctions
routes
modulation
optimization
augmentation

All Science Journal Classification (ASJC) codes

  • General

Cite this

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abstract = "Here we report the highest energy conversion efficiency and good stability of PbS thin film-based depleted heterojunction solar cells, not involving PbS quantum dots. The PbS thin films were grown by the low cost chemical bath deposition (CBD) process at relatively low temperatures. Compared to the quantum dot solar cells which require critical and multistep complex procedures for surface passivation, the present approach, leveraging the facile modulation of the optoelectronic properties of the PbS films by the CBD process, offers a simpler route for optimization of PbS-based solar cells. Through an architectural modification, wherein two band-aligned junctions are stacked without any intervening layers, an enhancement of conversion efficiency by as much as 30{\%} from 3.10 to 4.03{\%} facilitated by absorption of a wider range of solar spectrum has been obtained. As an added advantage of the low band gap PbS stacked over a wide gap PbS, the devices show stability over a period of 10 days.",
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Effect of band-aligned double absorber layers on photovoltaic characteristics of chemical bath deposited PbS/CdS thin film solar cells. / Ho Yeon, Deuk; Chandra Mohanty, Bhaskar; Lee, Seung Min; Cho, Yong Soo.

In: Scientific reports, Vol. 5, 14353, 23.09.2015.

Research output: Contribution to journalArticle

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