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A universal solution processed interfacial bilayer enabling ohmic contact in organic and hybrid optoelectronic devices
Energy & Environmental Science ( IF 32.4 ) Pub Date : 2019/12/02 , DOI: 10.1039/c9ee02202c Joel Troughton 1, 2, 3, 4, 5 , Marios Neophytou 1, 2, 3, 4, 5 , Nicola Gasparini 1, 2, 3, 4, 5 , Akmaral Seitkhan 1, 2, 3, 4, 5 , Furkan H. Isikgor 1, 2, 3, 4, 5 , Xin Song 1, 2, 3, 4, 5 , Yen-Hung Lin 6, 7, 8, 9, 10 , Tong Liu 6, 7, 8, 9, 10 , Hendrik Faber 1, 2, 3, 4, 5 , Emre Yengel 1, 2, 3, 4, 5 , Jan Kosco 1, 2, 3, 4, 5 , Marek F. Oszajca 11, 12, 13 , Benjamin Hartmeier 11, 12, 13 , Michael Rossier 11, 12, 13 , Norman A. Lüchinger 11, 12, 13 , Leonidas Tsetseris 6, 14, 15, 16 , Henry J. Snaith 6, 7, 8, 9, 10 , Stefaan De Wolf 1, 2, 3, 4, 5 , Thomas D. Anthopoulos 1, 2, 3, 4, 5 , Iain McCulloch 1, 2, 3, 4, 5 , Derya Baran 1, 2, 3, 4, 5
Energy & Environmental Science ( IF 32.4 ) Pub Date : 2019/12/02 , DOI: 10.1039/c9ee02202c Joel Troughton 1, 2, 3, 4, 5 , Marios Neophytou 1, 2, 3, 4, 5 , Nicola Gasparini 1, 2, 3, 4, 5 , Akmaral Seitkhan 1, 2, 3, 4, 5 , Furkan H. Isikgor 1, 2, 3, 4, 5 , Xin Song 1, 2, 3, 4, 5 , Yen-Hung Lin 6, 7, 8, 9, 10 , Tong Liu 6, 7, 8, 9, 10 , Hendrik Faber 1, 2, 3, 4, 5 , Emre Yengel 1, 2, 3, 4, 5 , Jan Kosco 1, 2, 3, 4, 5 , Marek F. Oszajca 11, 12, 13 , Benjamin Hartmeier 11, 12, 13 , Michael Rossier 11, 12, 13 , Norman A. Lüchinger 11, 12, 13 , Leonidas Tsetseris 6, 14, 15, 16 , Henry J. Snaith 6, 7, 8, 9, 10 , Stefaan De Wolf 1, 2, 3, 4, 5 , Thomas D. Anthopoulos 1, 2, 3, 4, 5 , Iain McCulloch 1, 2, 3, 4, 5 , Derya Baran 1, 2, 3, 4, 5
Affiliation
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Optoelectronic devices typically require low-resistance ohmic contacts between the optical active layers and metal electrodes. Failure to make such a contact often results in a Schottky barrier which inhibits charge extraction and, in turn, reduces device performance. Here, we introduce a universal solution processable metal-oxide/organic interfacial bilayer which forms a near-perfect ohmic contact between both organic and inorganic semiconductors and metals. This bilayer comprises a Nb-doped TiO2 metal oxide with enhanced electron mobility and reduced trap density compared to pristine TiO2, in combination with a metal-chelating organic molecule to make an intimate electrical contact with silver metallic electrodes. Using this universal interfacial bilayer, we demonstrate substantial efficiency improvements in organic solar cells (from 9.3% to 12.6% PCE), light emitting diodes (from 0.6 to 2.2 cd W−1) and transistors (from 19.7 to 13.9 V threshold voltage). In particular, a boost in efficiency for perovskite solar cells (from 18.7% up to 20.7% PCE) with up to 83% fill factor is achieved with no-operational lifetime loss for at least 1000 hours under continuous, full-spectrum illumination.
中文翻译：
通用溶液处理界面双层，可在有机和混合光电设备中实现欧姆接触
光电器件通常需要光学有源层和金属电极之间的低电阻欧姆接触。无法进行这种接触通常会导致肖特基势垒，从而阻碍电荷提取，进而降低器件性能。在这里，我们介绍了一种通用溶液可加工的金属氧化物/有机界面双层，可在有机和无机半导体与金属之间形成近乎完美的欧姆接触。与原始的TiO 2相比，该双层包含Nb掺杂的TiO 2金属氧化物，该氧化物具有增强的电子迁移率和降低的陷阱密度。，与金属螯合有机分子结合，与银金属电极形成紧密的电接触。使用这种通用界面双层，我们证明了有机太阳能电池（从9.3％到12.6％PCE），发光二极管（从0.6到2.2 cd W -1）和晶体管（从19.7到13.9 V阈值电压）的效率显着提高。特别是，钙钛矿型太阳能电池的效率提高了（从18.7％到20.7％PCE），填充系数高达83％，并且在连续的全光谱照明下至少有1000个小时没有使用寿命损失。
更新日期：2020-02-13
中文翻译：
通用溶液处理界面双层，可在有机和混合光电设备中实现欧姆接触
光电器件通常需要光学有源层和金属电极之间的低电阻欧姆接触。无法进行这种接触通常会导致肖特基势垒，从而阻碍电荷提取，进而降低器件性能。在这里，我们介绍了一种通用溶液可加工的金属氧化物/有机界面双层，可在有机和无机半导体与金属之间形成近乎完美的欧姆接触。与原始的TiO 2相比，该双层包含Nb掺杂的TiO 2金属氧化物，该氧化物具有增强的电子迁移率和降低的陷阱密度。，与金属螯合有机分子结合，与银金属电极形成紧密的电接触。使用这种通用界面双层，我们证明了有机太阳能电池（从9.3％到12.6％PCE），发光二极管（从0.6到2.2 cd W -1）和晶体管（从19.7到13.9 V阈值电压）的效率显着提高。特别是，钙钛矿型太阳能电池的效率提高了（从18.7％到20.7％PCE），填充系数高达83％，并且在连续的全光谱照明下至少有1000个小时没有使用寿命损失。
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