Nanoporous GaN/n-type GaN: a cathode structure for ITO-free perovskite solar cells
Alsalloum, Abdullah Yousef
Kim, Yeong Jae
Yoo, Young Jin
Subedi, Ram Chandra
Yoon, Sang Eun
Kim, Jong Hyun
Jung, Sung Hoon
Song, Young Min
Roqan, Iman S.
Ng, Tien Khee
Ooi, Boon S.
KAUST DepartmentComputer, Electrical and Mathematical Sciences and Engineering (CEMSE) Division
Electrical Engineering Program
Functional Nanomaterials Lab (FuNL)
KAUST Catalysis Center (KCC)
KAUST Catalyst Center (KCC).
KAUST Solar Center (KSC)
Material Science and Engineering Program
Physical Science and Engineering (PSE) Division
Semiconductor and Material Spectroscopy (SMS) Laboratory
Online Publication Date2020-09-17
Print Publication Date2020-10-09
Embargo End Date2021-09-17
Permanent link to this recordhttp://hdl.handle.net/10754/665346
MetadataShow full item record
AbstractIntroducing suitable electron/hole transport layers and transparent conductive layers (TCLs) into perovskite solar cells (PSCs) is key to enhancing the selective extraction of charge carriers and reducing surface recombination losses. Here, we introduce nanoporous gallium nitride (NP GaN)/n-type GaN (n-GaN) as a dual-function cathode structure for PSCs, acting as both the TCL and the electron transport layer (ETL). We demonstrate that the hierarchical NP GaN structure provides an expanded interfacial contact area with the perovskite absorber, while the n-GaN under the NP GaN displays high transmittance in the visible spectrum as well as higher lateral electric conductivity than that of a conventional ITO film. Prototype MAPbI3 PSCs based on this NP GaN/n-GaN cathode structure (without an extra ETL) show a power conversion efficiency of up to 18.79%. The NP GaN/n-GaN platform demonstrated herein paves the way for PSCs to take advantage of the widely available heterostructures of mature III-nitride-based technologies.
CitationLee, K. J., Min, J.-W., Turedi, B., Alsalloum, A. Y., Min, J.-H., Kim, Y. J., … Bakr, O. M. (2020). Nanoporous GaN/n-type GaN: a cathode structure for ITO-free perovskite solar cells. ACS Energy Letters. doi:10.1021/acsenergylett.0c01621
SponsorsThe authors gratefully acknowledge the financial support provided by King Abdullah University of Science and Technology (KAUST).
PublisherAmerican Chemical Society (ACS)
JournalACS Energy Letters