Journal article 826 views
Origin of Open‐Circuit Voltage Enhancements in Planar Perovskite Solar Cells Induced by Addition of Bulky Organic Cations
Advanced Functional Materials, Volume: 30, Issue: 7, Start page: 1906763
Swansea University Author:
James Durrant
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DOI (Published version): 10.1002/adfm.201906763
Abstract
The origin of performance enhancements in p‐i‐n perovskite solar cells (PSCs) when incorporating low concentrations of the bulky cation 1‐naphthylmethylamine (NMA) are discussed. A 0.25 vol % addition of NMA increases the open circuit voltage (Voc) of methylammonium lead iodide (MAPbI3) PSCs from 1....
Published in: | Advanced Functional Materials |
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ISSN: | 1616-301X 1616-3028 |
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Wiley
2020
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URI: | https://cronfa.swan.ac.uk/Record/cronfa53130 |
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<?xml version="1.0"?><rfc1807><datestamp>2020-07-01T16:41:11.3299351</datestamp><bib-version>v2</bib-version><id>53130</id><entry>2020-01-07</entry><title>Origin of Open‐Circuit Voltage Enhancements in Planar Perovskite Solar Cells Induced by Addition of Bulky Organic Cations</title><swanseaauthors><author><sid>f3dd64bc260e5c07adfa916c27dbd58a</sid><ORCID>0000-0001-8353-7345</ORCID><firstname>James</firstname><surname>Durrant</surname><name>James Durrant</name><active>true</active><ethesisStudent>false</ethesisStudent></author></swanseaauthors><date>2020-01-07</date><deptcode>MTLS</deptcode><abstract>The origin of performance enhancements in p‐i‐n perovskite solar cells (PSCs) when incorporating low concentrations of the bulky cation 1‐naphthylmethylamine (NMA) are discussed. A 0.25 vol % addition of NMA increases the open circuit voltage (Voc) of methylammonium lead iodide (MAPbI3) PSCs from 1.06 to 1.16 V and their power conversion efficiency (PCE) from 18.7% to 20.1%. X‐ray photoelectron spectroscopy and low energy ion scattering data show NMA is located at grain surfaces, not the bulk. Scanning electron microscopy shows combining NMA addition with solvent assisted annealing creates large grains that span the active layer. Steady state and transient photoluminescence data show NMA suppresses non‐radiative recombination resulting from charge trapping, consistent with passivation of grain surfaces. Increasing the NMA concentration reduces device short‐circuit current density and PCE, also suppressing photoluminescence quenching at charge transport layers. Both Voc and PCE enhancements are observed when bulky cations (phenyl(ethyl/methyl)ammonium) are incorporated, but not smaller cations (Cs/MA)—indicating size is a key parameter. Finally, it demonstrates that NMA also enhances mixed iodide/bromide wide bandgap PSCs (Voc of 1.22 V with a 1.68 eV bandgap). The results demonstrate a facile approach to maximizing Voc and provide insights into morphological control and charge carrier dynamics induced by bulky cations in PSCs.</abstract><type>Journal Article</type><journal>Advanced Functional Materials</journal><volume>30</volume><journalNumber>7</journalNumber><paginationStart>1906763</paginationStart><publisher>Wiley</publisher><issnPrint>1616-301X</issnPrint><issnElectronic>1616-3028</issnElectronic><keywords/><publishedDay>12</publishedDay><publishedMonth>2</publishedMonth><publishedYear>2020</publishedYear><publishedDate>2020-02-12</publishedDate><doi>10.1002/adfm.201906763</doi><url>https://spiral.imperial.ac.uk/handle/10044/1/77991</url><notes/><college>COLLEGE NANME</college><department>Materials Science and Engineering</department><CollegeCode>COLLEGE CODE</CollegeCode><DepartmentCode>MTLS</DepartmentCode><institution>Swansea University</institution><apcterm/><lastEdited>2020-07-01T16:41:11.3299351</lastEdited><Created>2020-01-07T10:50:47.6863091</Created><authors><author><firstname>Chieh‐Ting</firstname><surname>Lin</surname><order>1</order></author><author><firstname>Jinho</firstname><surname>Lee</surname><order>2</order></author><author><firstname>Jinhyun</firstname><surname>Kim</surname><order>3</order></author><author><firstname>Thomas J.</firstname><surname>Macdonald</surname><order>4</order></author><author><firstname>Jonathan</firstname><surname>Ngiam</surname><order>5</order></author><author><firstname>Bob</firstname><surname>Xu</surname><order>6</order></author><author><firstname>Matyas</firstname><surname>Daboczi</surname><order>7</order></author><author><firstname>Weidong</firstname><surname>Xu</surname><order>8</order></author><author><firstname>Sebastian</firstname><surname>Pont</surname><order>9</order></author><author><firstname>Byoungwook</firstname><surname>Park</surname><order>10</order></author><author><firstname>Hongkyu</firstname><surname>Kang</surname><order>11</order></author><author><firstname>Ji‐Seon</firstname><surname>Kim</surname><order>12</order></author><author><firstname>David J.</firstname><surname>Payne</surname><order>13</order></author><author><firstname>Kwanghee</firstname><surname>Lee</surname><order>14</order></author><author><firstname>James</firstname><surname>Durrant</surname><orcid>0000-0001-8353-7345</orcid><order>15</order></author><author><firstname>Martyn A.</firstname><surname>McLachlan</surname><order>16</order></author></authors><documents/><OutputDurs/></rfc1807> |
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2020-07-01T16:41:11.3299351 v2 53130 2020-01-07 Origin of Open‐Circuit Voltage Enhancements in Planar Perovskite Solar Cells Induced by Addition of Bulky Organic Cations f3dd64bc260e5c07adfa916c27dbd58a 0000-0001-8353-7345 James Durrant James Durrant true false 2020-01-07 MTLS The origin of performance enhancements in p‐i‐n perovskite solar cells (PSCs) when incorporating low concentrations of the bulky cation 1‐naphthylmethylamine (NMA) are discussed. A 0.25 vol % addition of NMA increases the open circuit voltage (Voc) of methylammonium lead iodide (MAPbI3) PSCs from 1.06 to 1.16 V and their power conversion efficiency (PCE) from 18.7% to 20.1%. X‐ray photoelectron spectroscopy and low energy ion scattering data show NMA is located at grain surfaces, not the bulk. Scanning electron microscopy shows combining NMA addition with solvent assisted annealing creates large grains that span the active layer. Steady state and transient photoluminescence data show NMA suppresses non‐radiative recombination resulting from charge trapping, consistent with passivation of grain surfaces. Increasing the NMA concentration reduces device short‐circuit current density and PCE, also suppressing photoluminescence quenching at charge transport layers. Both Voc and PCE enhancements are observed when bulky cations (phenyl(ethyl/methyl)ammonium) are incorporated, but not smaller cations (Cs/MA)—indicating size is a key parameter. Finally, it demonstrates that NMA also enhances mixed iodide/bromide wide bandgap PSCs (Voc of 1.22 V with a 1.68 eV bandgap). The results demonstrate a facile approach to maximizing Voc and provide insights into morphological control and charge carrier dynamics induced by bulky cations in PSCs. Journal Article Advanced Functional Materials 30 7 1906763 Wiley 1616-301X 1616-3028 12 2 2020 2020-02-12 10.1002/adfm.201906763 https://spiral.imperial.ac.uk/handle/10044/1/77991 COLLEGE NANME Materials Science and Engineering COLLEGE CODE MTLS Swansea University 2020-07-01T16:41:11.3299351 2020-01-07T10:50:47.6863091 Chieh‐Ting Lin 1 Jinho Lee 2 Jinhyun Kim 3 Thomas J. Macdonald 4 Jonathan Ngiam 5 Bob Xu 6 Matyas Daboczi 7 Weidong Xu 8 Sebastian Pont 9 Byoungwook Park 10 Hongkyu Kang 11 Ji‐Seon Kim 12 David J. Payne 13 Kwanghee Lee 14 James Durrant 0000-0001-8353-7345 15 Martyn A. McLachlan 16 |
title |
Origin of Open‐Circuit Voltage Enhancements in Planar Perovskite Solar Cells Induced by Addition of Bulky Organic Cations |
spellingShingle |
Origin of Open‐Circuit Voltage Enhancements in Planar Perovskite Solar Cells Induced by Addition of Bulky Organic Cations James Durrant |
title_short |
Origin of Open‐Circuit Voltage Enhancements in Planar Perovskite Solar Cells Induced by Addition of Bulky Organic Cations |
title_full |
Origin of Open‐Circuit Voltage Enhancements in Planar Perovskite Solar Cells Induced by Addition of Bulky Organic Cations |
title_fullStr |
Origin of Open‐Circuit Voltage Enhancements in Planar Perovskite Solar Cells Induced by Addition of Bulky Organic Cations |
title_full_unstemmed |
Origin of Open‐Circuit Voltage Enhancements in Planar Perovskite Solar Cells Induced by Addition of Bulky Organic Cations |
title_sort |
Origin of Open‐Circuit Voltage Enhancements in Planar Perovskite Solar Cells Induced by Addition of Bulky Organic Cations |
author_id_str_mv |
f3dd64bc260e5c07adfa916c27dbd58a |
author_id_fullname_str_mv |
f3dd64bc260e5c07adfa916c27dbd58a_***_James Durrant |
author |
James Durrant |
author2 |
Chieh‐Ting Lin Jinho Lee Jinhyun Kim Thomas J. Macdonald Jonathan Ngiam Bob Xu Matyas Daboczi Weidong Xu Sebastian Pont Byoungwook Park Hongkyu Kang Ji‐Seon Kim David J. Payne Kwanghee Lee James Durrant Martyn A. McLachlan |
format |
Journal article |
container_title |
Advanced Functional Materials |
container_volume |
30 |
container_issue |
7 |
container_start_page |
1906763 |
publishDate |
2020 |
institution |
Swansea University |
issn |
1616-301X 1616-3028 |
doi_str_mv |
10.1002/adfm.201906763 |
publisher |
Wiley |
url |
https://spiral.imperial.ac.uk/handle/10044/1/77991 |
document_store_str |
0 |
active_str |
0 |
description |
The origin of performance enhancements in p‐i‐n perovskite solar cells (PSCs) when incorporating low concentrations of the bulky cation 1‐naphthylmethylamine (NMA) are discussed. A 0.25 vol % addition of NMA increases the open circuit voltage (Voc) of methylammonium lead iodide (MAPbI3) PSCs from 1.06 to 1.16 V and their power conversion efficiency (PCE) from 18.7% to 20.1%. X‐ray photoelectron spectroscopy and low energy ion scattering data show NMA is located at grain surfaces, not the bulk. Scanning electron microscopy shows combining NMA addition with solvent assisted annealing creates large grains that span the active layer. Steady state and transient photoluminescence data show NMA suppresses non‐radiative recombination resulting from charge trapping, consistent with passivation of grain surfaces. Increasing the NMA concentration reduces device short‐circuit current density and PCE, also suppressing photoluminescence quenching at charge transport layers. Both Voc and PCE enhancements are observed when bulky cations (phenyl(ethyl/methyl)ammonium) are incorporated, but not smaller cations (Cs/MA)—indicating size is a key parameter. Finally, it demonstrates that NMA also enhances mixed iodide/bromide wide bandgap PSCs (Voc of 1.22 V with a 1.68 eV bandgap). The results demonstrate a facile approach to maximizing Voc and provide insights into morphological control and charge carrier dynamics induced by bulky cations in PSCs. |
published_date |
2020-02-12T04:05:57Z |
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1763753441872576512 |
score |
11.021648 |