Hot‐Substrate Deposition of Hole‐ and Electron‐Transport Layers for Enhanced Performance in Perovskite Solar Cells. Issue 2 (18th September 2017)

• Record Type: Journal Article
• Authors: Yu, Zhenhua; Zhang, Linxing; Tian, Sen; Zhang, Fan; Zhang, Bin; Niu, Fangfang; Zeng, Pengju; Qu, Junle; Rudd, Peter Neil; Huang, Jinsong; Lian, Jiarong
• Is Part Of: Advanced energy materials. Volume 8:Issue 2(2018)
• Page Start: n/a
• Page End: n/a
• Publication Date: 2017-09-18
• Subjects: charge transport layers -- hot substrate deposition -- p–i–n structures -- uniform morphology; Energy harvesting -- Materials -- Periodicals; Energy conversion -- Materials -- Periodicals; Energy storage -- Materials -- Periodicals; Photovoltaics -- Periodicals; Fuel cells -- Periodicals; Thermoelectric materials -- Periodicals; 621.31
• DOI: 10.1002/aenm.201701659
• Languages: English
• ISSNs: 1614-6832

Abstract

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 ( V oc ) 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 V oc 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. Abstract : A hot‐substrate deposition method contributes to the modification of both hole‐transport layers and electron‐transport layers with high coverage and uniform morphology. It is useful to reduce the current leakage and series resistance resulting from rough and discontinuous charge transport layers in perovskite solar cells. This strategy improves open‐circuit voltage and power conversion efficiency of the device to 1.105 V and 19.16%, respectively.