Highly reproducible, efficient hysteresis-less CH3NH3PbI3-xClx planar hybrid solar cells without requiring heat-treatment

Jin Hyuck Heo, Sang Hyuk Im

Research output: Contribution to journalArticle

46 Citations (Scopus)

Abstract

CH3NH3PbI3-xClx(MAPbI3-xClx) mixed halide perovskite powder with uniform composition was synthesized via simple solution chemistry, which demonstrates highly reproducible, efficient planar type MAPbI3-xClx mixed halide perovskite solar cells. Pure MAPbI3-xClx mixed halide perovskite powder was synthesized by reacting a 3:1 molar ratio of MAI:PbCl2 powder mixture in isopropanol (IPA) solution for 30 min at 60 °C with subsequent repeated centrifugation and washing in IPA. IPA functions as both the reaction medium for the formation of MAPbI3-xClx mixed halide and a selective remover of unreacted MAI and MACl byproducts. Accordingly, we could deposit a pinhole-free dense MAPbI3-xClx mixed halide perovskite film on a TiO2/FTO substrate through a simple one step spin-coating of pure MAPbI3-xClx mixed halide perovskite powder in DMF solution with HI additive, without further long heat-treatment processes. The deposited MAPbI3-xClx mixed halide perovskite film revealed uniform composition throughout the entire area, and the ratio of Cl to I + Cl and I + Cl to Pb was constant at ∼0.03 and ∼1/3, respectively. On the other hand, the conventional MAPbI3-xClx mixed halide perovskite film prepared by the long heat-treatment process had non-uniform composition because the ratio of Cl to I + Cl fluctuated greatly from 0 to 7.2. The average efficiency of planar type MAPbI3-xClx mixed halide perovskite solar cells was 18.65% ± 0.30% and the champion cell had 1.11 V Voc, 22.1 mA cm-2Jsc, 77% F.F., and 18.9% η for forward scan conditions and 1.11 V Voc, 22.1 mA cm-2Jsc, 78% F.F., and 19.1% η for reverse scan conditions. Although the thickness of the MAPbI3-xClx mixed halide perovskite layer varied from ∼500 nm to ∼900 nm, the efficiency was within the range of 18.3%-19.0%.

Original languageEnglish
Pages (from-to)2554-2560
Number of pages7
JournalNanoscale
Volume8
Issue number5
DOIs
Publication statusPublished - 2016 Feb 7
Externally publishedYes

Fingerprint

Perovskite
Hysteresis
Solar cells
Heat treatment
Powders
2-Propanol
Chemical analysis
Centrifugation
Spin coating
perovskite
Washing
Byproducts
Deposits
Substrates

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Highly reproducible, efficient hysteresis-less CH3NH3PbI3-xClx planar hybrid solar cells without requiring heat-treatment. / Heo, Jin Hyuck; Im, Sang Hyuk.

In: Nanoscale, Vol. 8, No. 5, 07.02.2016, p. 2554-2560.

Research output: Contribution to journalArticle

@article{7e9881cd22b244589da611d54d610b65,
title = "Highly reproducible, efficient hysteresis-less CH3NH3PbI3-xClx planar hybrid solar cells without requiring heat-treatment",
abstract = "CH3NH3PbI3-xClx(MAPbI3-xClx) mixed halide perovskite powder with uniform composition was synthesized via simple solution chemistry, which demonstrates highly reproducible, efficient planar type MAPbI3-xClx mixed halide perovskite solar cells. Pure MAPbI3-xClx mixed halide perovskite powder was synthesized by reacting a 3:1 molar ratio of MAI:PbCl2 powder mixture in isopropanol (IPA) solution for 30 min at 60 °C with subsequent repeated centrifugation and washing in IPA. IPA functions as both the reaction medium for the formation of MAPbI3-xClx mixed halide and a selective remover of unreacted MAI and MACl byproducts. Accordingly, we could deposit a pinhole-free dense MAPbI3-xClx mixed halide perovskite film on a TiO2/FTO substrate through a simple one step spin-coating of pure MAPbI3-xClx mixed halide perovskite powder in DMF solution with HI additive, without further long heat-treatment processes. The deposited MAPbI3-xClx mixed halide perovskite film revealed uniform composition throughout the entire area, and the ratio of Cl to I + Cl and I + Cl to Pb was constant at ∼0.03 and ∼1/3, respectively. On the other hand, the conventional MAPbI3-xClx mixed halide perovskite film prepared by the long heat-treatment process had non-uniform composition because the ratio of Cl to I + Cl fluctuated greatly from 0 to 7.2. The average efficiency of planar type MAPbI3-xClx mixed halide perovskite solar cells was 18.65{\%} ± 0.30{\%} and the champion cell had 1.11 V Voc, 22.1 mA cm-2Jsc, 77{\%} F.F., and 18.9{\%} η for forward scan conditions and 1.11 V Voc, 22.1 mA cm-2Jsc, 78{\%} F.F., and 19.1{\%} η for reverse scan conditions. Although the thickness of the MAPbI3-xClx mixed halide perovskite layer varied from ∼500 nm to ∼900 nm, the efficiency was within the range of 18.3{\%}-19.0{\%}.",
author = "Heo, {Jin Hyuck} and Im, {Sang Hyuk}",
year = "2016",
month = "2",
day = "7",
doi = "10.1039/c5nr08458j",
language = "English",
volume = "8",
pages = "2554--2560",
journal = "Nanoscale",
issn = "2040-3364",
publisher = "Royal Society of Chemistry",
number = "5",

}

TY - JOUR

T1 - Highly reproducible, efficient hysteresis-less CH3NH3PbI3-xClx planar hybrid solar cells without requiring heat-treatment

AU - Heo, Jin Hyuck

AU - Im, Sang Hyuk

PY - 2016/2/7

Y1 - 2016/2/7

N2 - CH3NH3PbI3-xClx(MAPbI3-xClx) mixed halide perovskite powder with uniform composition was synthesized via simple solution chemistry, which demonstrates highly reproducible, efficient planar type MAPbI3-xClx mixed halide perovskite solar cells. Pure MAPbI3-xClx mixed halide perovskite powder was synthesized by reacting a 3:1 molar ratio of MAI:PbCl2 powder mixture in isopropanol (IPA) solution for 30 min at 60 °C with subsequent repeated centrifugation and washing in IPA. IPA functions as both the reaction medium for the formation of MAPbI3-xClx mixed halide and a selective remover of unreacted MAI and MACl byproducts. Accordingly, we could deposit a pinhole-free dense MAPbI3-xClx mixed halide perovskite film on a TiO2/FTO substrate through a simple one step spin-coating of pure MAPbI3-xClx mixed halide perovskite powder in DMF solution with HI additive, without further long heat-treatment processes. The deposited MAPbI3-xClx mixed halide perovskite film revealed uniform composition throughout the entire area, and the ratio of Cl to I + Cl and I + Cl to Pb was constant at ∼0.03 and ∼1/3, respectively. On the other hand, the conventional MAPbI3-xClx mixed halide perovskite film prepared by the long heat-treatment process had non-uniform composition because the ratio of Cl to I + Cl fluctuated greatly from 0 to 7.2. The average efficiency of planar type MAPbI3-xClx mixed halide perovskite solar cells was 18.65% ± 0.30% and the champion cell had 1.11 V Voc, 22.1 mA cm-2Jsc, 77% F.F., and 18.9% η for forward scan conditions and 1.11 V Voc, 22.1 mA cm-2Jsc, 78% F.F., and 19.1% η for reverse scan conditions. Although the thickness of the MAPbI3-xClx mixed halide perovskite layer varied from ∼500 nm to ∼900 nm, the efficiency was within the range of 18.3%-19.0%.

AB - CH3NH3PbI3-xClx(MAPbI3-xClx) mixed halide perovskite powder with uniform composition was synthesized via simple solution chemistry, which demonstrates highly reproducible, efficient planar type MAPbI3-xClx mixed halide perovskite solar cells. Pure MAPbI3-xClx mixed halide perovskite powder was synthesized by reacting a 3:1 molar ratio of MAI:PbCl2 powder mixture in isopropanol (IPA) solution for 30 min at 60 °C with subsequent repeated centrifugation and washing in IPA. IPA functions as both the reaction medium for the formation of MAPbI3-xClx mixed halide and a selective remover of unreacted MAI and MACl byproducts. Accordingly, we could deposit a pinhole-free dense MAPbI3-xClx mixed halide perovskite film on a TiO2/FTO substrate through a simple one step spin-coating of pure MAPbI3-xClx mixed halide perovskite powder in DMF solution with HI additive, without further long heat-treatment processes. The deposited MAPbI3-xClx mixed halide perovskite film revealed uniform composition throughout the entire area, and the ratio of Cl to I + Cl and I + Cl to Pb was constant at ∼0.03 and ∼1/3, respectively. On the other hand, the conventional MAPbI3-xClx mixed halide perovskite film prepared by the long heat-treatment process had non-uniform composition because the ratio of Cl to I + Cl fluctuated greatly from 0 to 7.2. The average efficiency of planar type MAPbI3-xClx mixed halide perovskite solar cells was 18.65% ± 0.30% and the champion cell had 1.11 V Voc, 22.1 mA cm-2Jsc, 77% F.F., and 18.9% η for forward scan conditions and 1.11 V Voc, 22.1 mA cm-2Jsc, 78% F.F., and 19.1% η for reverse scan conditions. Although the thickness of the MAPbI3-xClx mixed halide perovskite layer varied from ∼500 nm to ∼900 nm, the efficiency was within the range of 18.3%-19.0%.

UR - http://www.scopus.com/inward/record.url?scp=84956853790&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84956853790&partnerID=8YFLogxK

U2 - 10.1039/c5nr08458j

DO - 10.1039/c5nr08458j

M3 - Article

AN - SCOPUS:84956853790

VL - 8

SP - 2554

EP - 2560

JO - Nanoscale

JF - Nanoscale

SN - 2040-3364

IS - 5

ER -