Hot‐Substrate Deposition of Hole‐ and Electron‐Transport Layers for Enhanced Performance in Perovskite Solar Cells |
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| Authors: | Zhenhua Yu Linxing Zhang Sen Tian Fan Zhang Bin Zhang Fangfang Niu Pengju Zeng Junle Qu Peter Neil Rudd Jinsong Huang Jiarong Lian |
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| Institution: | 1. Key Laboratory of Optoelectronic Devices and Systems of Ministry of Education and Guangdong Province, College of Optoelectronic Engineering, Shenzhen University, Shenzhen, China;2. Department of Mechanical and Materials Engineering and Nebraska Center for Materials and Nanoscience, University of Nebraska‐Lincoln, Lincoln, NE, USA;3. Department of Applied Physical Sciences, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA |
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| Abstract: | Charge transport layers play an important role in determining the power conversion efficiencies (PCEs) of perovskite solar cells (PSCs). However, it has proven challenging to produce thin and compact charge transport layers via solution processing techniques. Herein, a hot substrate deposition method capable of improving the morphology of high‐coverage hole‐transport layers (HTLs) and electron‐transport layers (ETLs) is reported. PSC devices using HTLs deposited on a hot substrate show improvement in the open‐circuit voltage (Voc) from 1.041 to 1.070 V and the PCE from 17.00% to 18.01%. The overall device performance is then further enhanced with the hot substrate deposition of ETLs as the Voc and PCE reach 1.105 V and 19.16%, respectively. The improved performance can be explained by the decreased current leakage and series resistance, which are present in PSCs with rough and discontinuous HTLs and ETLs. |
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| Keywords: | charge transport layers hot substrate deposition p– i– n structures uniform morphology |
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