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Method of fabricating an optoelectronic device having a bulk heterojunction

Patent ·
OSTI ID:984975
 [1];  [1];  [1]
  1. Princeton, NJ
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A method of fabricating an organic optoelectronic device having a bulk heterojunction comprises the steps of: depositing a first layer over a first electrode by organic vapor phase deposition, wherein the first layer comprises a first organic small molecule material; depositing a second layer on the first layer such that the second layer is in physical contact with the first layer, wherein the interface of the second layer on the first layer forms a bulk heterojunction; and depositing a second electrode over the second layer to form the optoelectronic device. In another embodiment, a first layer having protrusions is deposited over the first electrode, wherein the first layer comprises a first organic small molecule material. For example, when the first layer is an electron donor layer, the first electrode is an anode, the second layer is an electron acceptor layer, and the second electrode is a cathode. As a further example, when the first layer is an electron acceptor layer, the first electrode is a cathode, the second layer is an electron donor layer, and the second electrode is an anode.

Research Organization:
National Renewable Energy Laboratory (NREL), Golden, CO (United States)
Sponsoring Organization:
USDOE
Assignee:
The Trustees of Princeton University (Princeton, NJ)
Patent Number(s):
7,419,846
Application Number:
10/824,288
OSTI ID:
984975
Country of Publication:
United States
Language:
English

References (11)

Polymer Photovoltaic Cells: Enhanced Efficiencies via a Network of Internal Donor-Acceptor Heterojunctions journal December 1995
Amorphous silicon alloy photovoltaic research—present and future journal January 2000
Novel photovoltaic devices based on donor-acceptor molecular and conducting polymer systems journal January 1997
Effects of Postproduction Treatment on Plastic Solar Cells journal January 2003
Efficient bulk heterojunction photovoltaic cells using small-molecular-weight organic thin films journal September 2003
Small molecular weight organic thin-film photodetectors and solar cells journal April 2003
CuPc/C 60 Solar Cells–Influence of the Indium Tin Oxide Substrate and Device Architecture on the Solar Cell Performance journal April 2004
Organic Vapor Phase Deposition journal December 1998
Preparation of organic bulk heterojunction photovoltaic cells by evaporative spray deposition from ultradilute solution journal March 2004
Ultrathin Organic Films Grown by Organic Molecular Beam Deposition and Related Techniques journal October 1997
Efficient photon harvesting at high optical intensities in ultrathin organic double-heterostructure photovoltaic diodes journal May 2000

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