Gallium cationic incorporated compact TiO2 as an efficient electron-transporting layer for stable perovskite solar cells

Sawanta S. Mali; Jyoti V. Patil; Hyungjin Kim; Chang Kook Hong

doi:10.1016/j.matt.2019.04.001

Gallium cationic incorporated compact TiO₂ as an efficient electron-transporting layer for stable perovskite solar cells

Sawanta S. Mali^*, Jyoti V. Patil, Hyungjin Kim, Chang Kook Hong^*

^*Corresponding author for this work

Pure And Applied Chemistry

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

37 Citations (Scopus)

Abstract

The electron-transporting layer (ETL) in perovskite solar cells (PSCs) is playing a vital role in improving the power-conversion efficiency (PCE). To date, the certified highest 23.2% efficiency has been reported only for normal (n-i-p) type PSCs. Therefore, in the present investigation the high-quality Ga:TiO₂ compact layer ETLs (c-Ga:TiO₂) are prepared by simple spin-coating technique and the influence of Ga cation doping in c-TiO₂ ETL is studied. Systematic study in this work revealed that the Ga cation doping significantly influences the current density, open-circuit voltage (V_OC), and fill factor (FF), and reduces the charge recombination of the perovskite devices. Optimized devices exhibit a PCE >19.57% ±0.5% with >200 days of air stability for 1% Ga doping. The final efficiency of the champion cell independently certified at the KITECH is 18.89% with V_OC of 1.138 V, FF of 78.54%, and short-circuit current density of 21.72 mA cm⁻².

Original language	English
Pages (from-to)	452-464
Number of pages	13
Journal	Matter
Volume	1
Issue number	2
Early online date	24 Jul 2019
DOIs	https://doi.org/10.1016/j.matt.2019.04.001
Publication status	Published - 7 Aug 2019

Funding

This research work was supported by Basics Science Research Program through the National Foundation of Korea (NRF) funded by the Ministry of Education (NRF-2017R1A2B4008117). This work was also supported by Korea Research Fellowship Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Science, ICT and Future Planning (2016H1D3A1909289) for an outstanding overseas young researcher. This work was supported by Priority Research Centers Program through the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (2018R1A6A1A03024334) and a National Research Foundation of Korea (NRF) grant funded by the Korea government (2018R1C1B6008218).

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Keywords

>19.5% efficiency
air stability over 200 days
electron-transporting layer
fast charge transport
Ga3+ cation doping

Access to Document

10.1016/j.matt.2019.04.001

Cite this

@article{8206229eb11845fcb12a710cd098ac20,

title = "Gallium cationic incorporated compact TiO2 as an efficient electron-transporting layer for stable perovskite solar cells",

abstract = "The electron-transporting layer (ETL) in perovskite solar cells (PSCs) is playing a vital role in improving the power-conversion efficiency (PCE). To date, the certified highest 23.2\% efficiency has been reported only for normal (n-i-p) type PSCs. Therefore, in the present investigation the high-quality Ga:TiO2 compact layer ETLs (c-Ga:TiO2) are prepared by simple spin-coating technique and the influence of Ga cation doping in c-TiO2 ETL is studied. Systematic study in this work revealed that the Ga cation doping significantly influences the current density, open-circuit voltage (VOC), and fill factor (FF), and reduces the charge recombination of the perovskite devices. Optimized devices exhibit a PCE >19.57\% ±0.5\% with >200 days of air stability for 1\% Ga doping. The final efficiency of the champion cell independently certified at the KITECH is 18.89\% with VOC of 1.138 V, FF of 78.54\%, and short-circuit current density of 21.72 mA cm−2.",

keywords = ">19.5\% efficiency, air stability over 200 days, electron-transporting layer, fast charge transport, Ga3+ cation doping",

author = "Mali, \{Sawanta S.\} and Patil, \{Jyoti V.\} and Hyungjin Kim and Hong, \{Chang Kook\}",

year = "2019",

month = aug,

day = "7",

doi = "10.1016/j.matt.2019.04.001",

language = "English",

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journal = "Matter",

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T1 - Gallium cationic incorporated compact TiO2 as an efficient electron-transporting layer for stable perovskite solar cells

AU - Mali, Sawanta S.

AU - Patil, Jyoti V.

AU - Kim, Hyungjin

AU - Hong, Chang Kook

PY - 2019/8/7

Y1 - 2019/8/7

N2 - The electron-transporting layer (ETL) in perovskite solar cells (PSCs) is playing a vital role in improving the power-conversion efficiency (PCE). To date, the certified highest 23.2% efficiency has been reported only for normal (n-i-p) type PSCs. Therefore, in the present investigation the high-quality Ga:TiO2 compact layer ETLs (c-Ga:TiO2) are prepared by simple spin-coating technique and the influence of Ga cation doping in c-TiO2 ETL is studied. Systematic study in this work revealed that the Ga cation doping significantly influences the current density, open-circuit voltage (VOC), and fill factor (FF), and reduces the charge recombination of the perovskite devices. Optimized devices exhibit a PCE >19.57% ±0.5% with >200 days of air stability for 1% Ga doping. The final efficiency of the champion cell independently certified at the KITECH is 18.89% with VOC of 1.138 V, FF of 78.54%, and short-circuit current density of 21.72 mA cm−2.

AB - The electron-transporting layer (ETL) in perovskite solar cells (PSCs) is playing a vital role in improving the power-conversion efficiency (PCE). To date, the certified highest 23.2% efficiency has been reported only for normal (n-i-p) type PSCs. Therefore, in the present investigation the high-quality Ga:TiO2 compact layer ETLs (c-Ga:TiO2) are prepared by simple spin-coating technique and the influence of Ga cation doping in c-TiO2 ETL is studied. Systematic study in this work revealed that the Ga cation doping significantly influences the current density, open-circuit voltage (VOC), and fill factor (FF), and reduces the charge recombination of the perovskite devices. Optimized devices exhibit a PCE >19.57% ±0.5% with >200 days of air stability for 1% Ga doping. The final efficiency of the champion cell independently certified at the KITECH is 18.89% with VOC of 1.138 V, FF of 78.54%, and short-circuit current density of 21.72 mA cm−2.

KW - >19.5% efficiency

KW - air stability over 200 days

KW - electron-transporting layer

KW - fast charge transport

KW - Ga3+ cation doping

U2 - 10.1016/j.matt.2019.04.001

DO - 10.1016/j.matt.2019.04.001

M3 - Article

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SN - 2590-2393

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JO - Matter

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