Journal
NATURE ENERGY
Volume 4, Issue 2, Pages 150-159Publisher
NATURE PUBLISHING GROUP
DOI: 10.1038/s41560-018-0324-8
Keywords
-
Funding
- National Natural Science Foundation of China [51772096]
- Natural Science Foundation of Beijing Municipality [L172036]
- Ministry of Education [6141A020225]
- Par-Eu Scholars Program
- Science and Technology Beijing 100 Leading Talent Training Project
- Beijing Municipal Science and Technology Project [Z161100002616039]
- Fundamental Research Funds for the Central Universities [2016JQ01, 2017ZZD02]
- NCEPU 'Double First-Class' Graduate Talent Cultivation Program
- China Scholarship Council
Ask authors/readers for more resources
Perovskite solar cells (PSCs) have emerged as an attractive photovoltaic technology thanks to their outstanding power conversion efficiency (PCE). Further improvement in the device efficiency is limited by the recombination of the charge carriers in the perovskite layer even when employing heterojunction-based architectures. Here, we propose and demonstrate a p-type perovskite/n-type perovskite homojunction whose built-in electric field promotes oriented transport of the photo-induced carriers, thus reducing carrier recombination losses. By controlling the stoichiometry of the perovskite precursors, we are able to induce n-type or p-type doping. We integrate the homojunction structure in a planar PSC combining a thermally evaporated p-type perovskite layer on a solution-processed n-type perovskite layer. The PSC with a MAPbI(3) homojunction achieves a PCE of 20.80% (20.5% certified PCE), whereas the PSC based on a FA(0.15)MA(0.85)PbI(3) homojunction delivers a PCE of 21.38%. We demonstrate that the homojunction structure is an effective approach, beyond existing planar heterojunction PSCs, to achieve highly efficient PSCs with reduced carrier recombination losses.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available