Tailoring the Grain Boundaries of Wide-Bandgap Perovskite Solar Cells by Molecular Engineering

Khalid Emshadi; Nabin Ghimire; Ashim Gurung; Behzad Bahrami; Rajesh Pathak; Raja Sekhar Bobba; Buddhi Sagar Lamsal; Sheikh Ifatur Rahman; Ashraful Haider Chowdhury; Ke Chen; Md Ashiqur Rahman Laskar; Wenqin Luo; Hytham Elbohy; Quinn Qiao

doi:10.1002/solr.202000384

Tailoring the Grain Boundaries of Wide-Bandgap Perovskite Solar Cells by Molecular Engineering

Khalid Emshadi, Nabin Ghimire, Ashim Gurung, Behzad Bahrami, Rajesh Pathak, Raja Sekhar Bobba, Buddhi Sagar Lamsal, Sheikh Ifatur Rahman, Ashraful Haider Chowdhury, Ke Chen, Md Ashiqur Rahman Laskar, Wenqin Luo, Hytham Elbohy, Quinn Qiao

Research output: Contribution to journal › Article › peer-review

18 Scopus citations

Abstract

Due to the attraction of fabricating highly efficient tandem solar cells, wide-bandgap perovskite solar cells (PSCs) have attracted substantial interest in recent years. However, polycrystalline perovskite thin-films show the existence of trap states at grain boundaries which diminish the optoelectronic properties of the perovskite and thus remains a challenge. Here, a one-step solution-processing of (Formula presented.) wide-bandgap perovskite using phenylhydrazine iodide with amino groups is demonstrated to successfully passivate the trap density within grain boundaries and increase the perovskite grain size. The reinforced morphology and grain boundaries treatment considerably enhanced the power conversion efficiency (PCE) from 12.16% for pristine to 14.63% for the treated devices. This strategy can be easily adopted to other perovskites and help realize highly efficient perovskite solar cells.

Original language	English (US)
Article number	2000384
Journal	Solar RRL
Volume	4
Issue number	12
DOIs	https://doi.org/10.1002/solr.202000384
State	Published - Dec 2020
Externally published	Yes

Keywords

doping
surface passivation
trap states suppression
wide-bandgap perovskite solar cells

ASJC Scopus subject areas

Electronic, Optical and Magnetic Materials
Atomic and Molecular Physics, and Optics
Energy Engineering and Power Technology
Electrical and Electronic Engineering

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10.1002/solr.202000384

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title = "Tailoring the Grain Boundaries of Wide-Bandgap Perovskite Solar Cells by Molecular Engineering",

abstract = "Due to the attraction of fabricating highly efficient tandem solar cells, wide-bandgap perovskite solar cells (PSCs) have attracted substantial interest in recent years. However, polycrystalline perovskite thin-films show the existence of trap states at grain boundaries which diminish the optoelectronic properties of the perovskite and thus remains a challenge. Here, a one-step solution-processing of (Formula presented.) wide-bandgap perovskite using phenylhydrazine iodide with amino groups is demonstrated to successfully passivate the trap density within grain boundaries and increase the perovskite grain size. The reinforced morphology and grain boundaries treatment considerably enhanced the power conversion efficiency (PCE) from 12.16% for pristine to 14.63% for the treated devices. This strategy can be easily adopted to other perovskites and help realize highly efficient perovskite solar cells.",

keywords = "doping, surface passivation, trap states suppression, wide-bandgap perovskite solar cells",

author = "Khalid Emshadi and Nabin Ghimire and Ashim Gurung and Behzad Bahrami and Rajesh Pathak and Bobba, {Raja Sekhar} and Lamsal, {Buddhi Sagar} and Rahman, {Sheikh Ifatur} and Chowdhury, {Ashraful Haider} and Ke Chen and Laskar, {Md Ashiqur Rahman} and Wenqin Luo and Hytham Elbohy and Quinn Qiao",

note = "Publisher Copyright: {\textcopyright} 2020 Wiley-VCH GmbH",

year = "2020",

month = dec,

doi = "10.1002/solr.202000384",

language = "English (US)",

volume = "4",

journal = "Solar RRL",

issn = "2367-198X",

publisher = "Wiley-VCH Verlag",

number = "12",

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TY - JOUR

T1 - Tailoring the Grain Boundaries of Wide-Bandgap Perovskite Solar Cells by Molecular Engineering

AU - Emshadi, Khalid

AU - Ghimire, Nabin

AU - Gurung, Ashim

AU - Bahrami, Behzad

AU - Pathak, Rajesh

AU - Bobba, Raja Sekhar

AU - Lamsal, Buddhi Sagar

AU - Rahman, Sheikh Ifatur

AU - Chowdhury, Ashraful Haider

AU - Chen, Ke

AU - Laskar, Md Ashiqur Rahman

AU - Luo, Wenqin

AU - Elbohy, Hytham

AU - Qiao, Quinn

PY - 2020/12

Y1 - 2020/12

N2 - Due to the attraction of fabricating highly efficient tandem solar cells, wide-bandgap perovskite solar cells (PSCs) have attracted substantial interest in recent years. However, polycrystalline perovskite thin-films show the existence of trap states at grain boundaries which diminish the optoelectronic properties of the perovskite and thus remains a challenge. Here, a one-step solution-processing of (Formula presented.) wide-bandgap perovskite using phenylhydrazine iodide with amino groups is demonstrated to successfully passivate the trap density within grain boundaries and increase the perovskite grain size. The reinforced morphology and grain boundaries treatment considerably enhanced the power conversion efficiency (PCE) from 12.16% for pristine to 14.63% for the treated devices. This strategy can be easily adopted to other perovskites and help realize highly efficient perovskite solar cells.

AB - Due to the attraction of fabricating highly efficient tandem solar cells, wide-bandgap perovskite solar cells (PSCs) have attracted substantial interest in recent years. However, polycrystalline perovskite thin-films show the existence of trap states at grain boundaries which diminish the optoelectronic properties of the perovskite and thus remains a challenge. Here, a one-step solution-processing of (Formula presented.) wide-bandgap perovskite using phenylhydrazine iodide with amino groups is demonstrated to successfully passivate the trap density within grain boundaries and increase the perovskite grain size. The reinforced morphology and grain boundaries treatment considerably enhanced the power conversion efficiency (PCE) from 12.16% for pristine to 14.63% for the treated devices. This strategy can be easily adopted to other perovskites and help realize highly efficient perovskite solar cells.

KW - doping

KW - surface passivation

KW - trap states suppression

KW - wide-bandgap perovskite solar cells

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DO - 10.1002/solr.202000384

M3 - Article

AN - SCOPUS:85092125489

SN - 2367-198X

VL - 4

JO - Solar RRL

JF - Solar RRL

IS - 12

M1 - 2000384

ER -

Tailoring the Grain Boundaries of Wide-Bandgap Perovskite Solar Cells by Molecular Engineering

Abstract

Keywords

ASJC Scopus subject areas

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